<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:c44cd649-47fa-483f-b3c1-5f9e9e8d2f39,g:82109d13-ce7b-405f-a2c8-8b20a62a0801-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesContinuingOperations_e997abcd-6f9e-4f7d-89c0-a9eb784606d2_negatedTotalLabel_es" xlink:label="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesContinuingOperations" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="es">Flujos de efectivo procedentes de (utilizados en) actividades de financiación, actividades continuadas</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInFinancingActivitiesContinuingOperations" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInFinancingActivitiesContinuingOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInFinancingActivitiesContinuingOperations" xlink:to="lab_ifrs-full_CashFlowsFromUsedInFinancingActivitiesContinuingOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesContinuingOperations_93cf05d6-7184-4d8b-9664-e9b475c93f02_negatedTotalLabel_es" xlink:label="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesContinuingOperations" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="es">Flujos de efectivo procedentes de (utilizados en) actividades de inversión, actividades continuadas</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInInvestingActivitiesContinuingOperations" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInInvestingActivitiesContinuingOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInInvestingActivitiesContinuingOperations" xlink:to="lab_ifrs-full_CashFlowsFromUsedInInvestingActivitiesContinuingOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod_93140896-63d5-4925-af4b-93dfc0324552_negatedTerseLabel_es" xlink:label="lab_ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ajustes por beneficios no distribuidos de inversiones contabilizadas según el método de puesta en equivalencia</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" xlink:to="lab_ifrs-full_AdjustmentsForUndistributedProfitsOfInvestmentsAccountedForUsingEquityMethod" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesContinuingOperations_1636c065-4e75-4d18-9787-1f2ced7005c1_totalLabel_es" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="es">Flujos de efectivo procedentes de (utilizados en) actividades de explotación, actividades continuadas</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperatingActivitiesContinuingOperations" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperatingActivitiesContinuingOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperatingActivitiesContinuingOperations" xlink:to="lab_ifrs-full_CashFlowsFromUsedInOperatingActivitiesContinuingOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_OtherComprehensiveIncomeNetOfTaxCashFlowHedgesContinuingOperations_label_es" xlink:label="lab_mer_OtherComprehensiveIncomeNetOfTaxCashFlowHedgesContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Otros ingresos integrales netos de impuestos coberturas de flujo de efectivo operaciones continuadas</link:label>
    <link:label id="lab_mer_OtherComprehensiveIncomeNetOfTaxCashFlowHedgesContinuingOperations_documentation_es" xlink:label="lab_mer_OtherComprehensiveIncomeNetOfTaxCashFlowHedgesContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Other comprehensiveIncome net of tax cash flow hedges continuing operations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_OtherComprehensiveIncomeNetOfTaxCashFlowHedgesContinuingOperations" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_OtherComprehensiveIncomeNetOfTaxCashFlowHedgesContinuingOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_OtherComprehensiveIncomeNetOfTaxCashFlowHedgesContinuingOperations" xlink:to="lab_mer_OtherComprehensiveIncomeNetOfTaxCashFlowHedgesContinuingOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_DescriptionOfAccountingPolicyForCurrentAssetsAndLiabilitiesTextBlock_label_es" xlink:label="lab_mer_DescriptionOfAccountingPolicyForCurrentAssetsAndLiabilitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Descripción de la política contable para activos y pasivos corrientes [Text Block]</link:label>
    <link:label id="lab_mer_DescriptionOfAccountingPolicyForCurrentAssetsAndLiabilitiesTextBlock_documentation_es" xlink:label="lab_mer_DescriptionOfAccountingPolicyForCurrentAssetsAndLiabilitiesTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Description of accounting policy for current assets and liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_DescriptionOfAccountingPolicyForCurrentAssetsAndLiabilitiesTextBlock" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_DescriptionOfAccountingPolicyForCurrentAssetsAndLiabilitiesTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_DescriptionOfAccountingPolicyForCurrentAssetsAndLiabilitiesTextBlock" xlink:to="lab_mer_DescriptionOfAccountingPolicyForCurrentAssetsAndLiabilitiesTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_ProceedsFromSalesOfInvestments_7f4553c7-4048-4325-9e9b-2fbf72d38570_totalLabel_es" xlink:label="lab_mer_ProceedsFromSalesOfInvestments" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="es">Ingresos por ventas de inversiones</link:label>
    <link:label id="lab_mer_ProceedsFromSalesOfInvestments_label_es" xlink:label="lab_mer_ProceedsFromSalesOfInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Proceeds from sales of investments</link:label>
    <link:label id="lab_mer_ProceedsFromSalesOfInvestments_documentation_es" xlink:label="lab_mer_ProceedsFromSalesOfInvestments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Proceeds from sales of investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_ProceedsFromSalesOfInvestments" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_ProceedsFromSalesOfInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_ProceedsFromSalesOfInvestments" xlink:to="lab_mer_ProceedsFromSalesOfInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeTaxesPaidRefund_d5faffb4-63b0-430a-98d1-7779f42e0779_negatedTerseLabel_es" xlink:label="lab_ifrs-full_IncomeTaxesPaidRefund" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Impuestos sobre la renta pagados, clasificados como actividades operativas</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxesPaidRefund" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxesPaidRefund"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncomeTaxesPaidRefund" xlink:to="lab_ifrs-full_IncomeTaxesPaidRefund" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets_461e4640-0edf-4669-8a93-2c2224c150de_negatedTerseLabel_es" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ajustes por disminución (aumento) en otros activos corrientes</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:to="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInOtherCurrentAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_ProceedsAndPaymentsFromEquityInstruments_0c64ffd1-728a-42cf-9159-3f835ac30ec8_negatedTotalLabel_es" xlink:label="lab_mer_ProceedsAndPaymentsFromEquityInstruments" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="es">Ingresos y pagos procedentes de instrumentos de capital</link:label>
    <link:label id="lab_mer_ProceedsAndPaymentsFromEquityInstruments_label_es" xlink:label="lab_mer_ProceedsAndPaymentsFromEquityInstruments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Proceeds and payments from equity instruments</link:label>
    <link:label id="lab_mer_ProceedsAndPaymentsFromEquityInstruments_documentation_es" xlink:label="lab_mer_ProceedsAndPaymentsFromEquityInstruments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Proceeds and payments from equity instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_ProceedsAndPaymentsFromEquityInstruments" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_ProceedsAndPaymentsFromEquityInstruments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_ProceedsAndPaymentsFromEquityInstruments" xlink:to="lab_mer_ProceedsAndPaymentsFromEquityInstruments" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_ContributionsToAssociatedCompaniesAndOtherNonCurrentInvestments_label_es" xlink:label="lab_mer_ContributionsToAssociatedCompaniesAndOtherNonCurrentInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Aportaciones a empresas asociadas y otras inversiones no corrientes</link:label>
    <link:label id="lab_mer_ContributionsToAssociatedCompaniesAndOtherNonCurrentInvestments_documentation_es" xlink:label="lab_mer_ContributionsToAssociatedCompaniesAndOtherNonCurrentInvestments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Contributions to associated companies and other non-current investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_ContributionsToAssociatedCompaniesAndOtherNonCurrentInvestments" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_ContributionsToAssociatedCompaniesAndOtherNonCurrentInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_ContributionsToAssociatedCompaniesAndOtherNonCurrentInvestments" xlink:to="lab_mer_ContributionsToAssociatedCompaniesAndOtherNonCurrentInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock_label_es" xlink:label="lab_mer_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Descripción de la política contable para instrumentos de patrimonio neto [Text Block]</link:label>
    <link:label id="lab_mer_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock_documentation_es" xlink:label="lab_mer_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Description of accounting policy for equity instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock" xlink:to="lab_mer_DescriptionOfAccountingPolicyForEquityInstrumentsTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_CashFlowInterestRateRiskAndFairValueRiskTextBlock_label_es" xlink:label="lab_mer_CashFlowInterestRateRiskAndFairValueRiskTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Riesgo de tipo de interés del flujo de caja y riesgo de valor razonable [Text Block]</link:label>
    <link:label id="lab_mer_CashFlowInterestRateRiskAndFairValueRiskTextBlock_documentation_es" xlink:label="lab_mer_CashFlowInterestRateRiskAndFairValueRiskTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Cash flow interest rate risk and fair value risk</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_CashFlowInterestRateRiskAndFairValueRiskTextBlock" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_CashFlowInterestRateRiskAndFairValueRiskTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_CashFlowInterestRateRiskAndFairValueRiskTextBlock" xlink:to="lab_mer_CashFlowInterestRateRiskAndFairValueRiskTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_AdjustmentsForDecreaseIncreaseInOtherAssetsAndLiabilities_label_es" xlink:label="lab_mer_AdjustmentsForDecreaseIncreaseInOtherAssetsAndLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Ajustes por disminución o aumento en otros activos y pasivos</link:label>
    <link:label id="lab_mer_AdjustmentsForDecreaseIncreaseInOtherAssetsAndLiabilities_documentation_es" xlink:label="lab_mer_AdjustmentsForDecreaseIncreaseInOtherAssetsAndLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Adjustments for decrease (increase) in other assets and liabilities to reconcile profit (loss) to net cash flow from (used in) operating activities.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_AdjustmentsForDecreaseIncreaseInOtherAssetsAndLiabilities" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_AdjustmentsForDecreaseIncreaseInOtherAssetsAndLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_AdjustmentsForDecreaseIncreaseInOtherAssetsAndLiabilities" xlink:to="lab_mer_AdjustmentsForDecreaseIncreaseInOtherAssetsAndLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_InterimDividend_label_es" xlink:label="lab_mer_InterimDividend" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Dividendo provisional</link:label>
    <link:label id="lab_mer_InterimDividend_documentation_es" xlink:label="lab_mer_InterimDividend" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">The amount of interim dividend.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_InterimDividend" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_InterimDividend"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_InterimDividend" xlink:to="lab_mer_InterimDividend" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_PaymentsForInvestments_fd71eea3-1423-4bdb-9cf7-e8578a1c13dd_negatedTotalLabel_es" xlink:label="lab_mer_PaymentsForInvestments" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="es">Pagos por inversiones</link:label>
    <link:label id="lab_mer_PaymentsForInvestments_label_es" xlink:label="lab_mer_PaymentsForInvestments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Payments for investments</link:label>
    <link:label id="lab_mer_PaymentsForInvestments_documentation_es" xlink:label="lab_mer_PaymentsForInvestments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Payments for investments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_PaymentsForInvestments" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_PaymentsForInvestments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_PaymentsForInvestments" xlink:to="lab_mer_PaymentsForInvestments" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_DisclosureOfPublicAdministrationsAndTaxStatusTextBlock_label_es" xlink:label="lab_mer_DisclosureOfPublicAdministrationsAndTaxStatusTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Divulgación de las administraciones públicas y situación fiscal [Text Block]</link:label>
    <link:label id="lab_mer_DisclosureOfPublicAdministrationsAndTaxStatusTextBlock_documentation_es" xlink:label="lab_mer_DisclosureOfPublicAdministrationsAndTaxStatusTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Disclosure of public administrations and tax status</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_DisclosureOfPublicAdministrationsAndTaxStatusTextBlock" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_DisclosureOfPublicAdministrationsAndTaxStatusTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_DisclosureOfPublicAdministrationsAndTaxStatusTextBlock" xlink:to="lab_mer_DisclosureOfPublicAdministrationsAndTaxStatusTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_CashAndCashEquivalentsContinuingOperations_label_es" xlink:label="lab_mer_CashAndCashEquivalentsContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Efectivo y equivalentes de efectivo, operaciones continuadas</link:label>
    <link:label id="lab_mer_CashAndCashEquivalentsContinuingOperations_documentation_es" xlink:label="lab_mer_CashAndCashEquivalentsContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Cash and cash equivalents, continuing operations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_CashAndCashEquivalentsContinuingOperations" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_CashAndCashEquivalentsContinuingOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_CashAndCashEquivalentsContinuingOperations" xlink:to="lab_mer_CashAndCashEquivalentsContinuingOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_GainsLossesOnFairValueAdjustmentInvestmentProperty_3f4a8c6e-3e9f-443a-bb96-36e68d4fdf0d_negatedLabel_es" xlink:label="lab_ifrs-full_GainsLossesOnFairValueAdjustmentInvestmentProperty" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="es">Ganancias (pérdidas) por ajuste del valor razonable, inversiones inmobiliarias</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnFairValueAdjustmentInvestmentProperty" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_GainsLossesOnFairValueAdjustmentInvestmentProperty"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_GainsLossesOnFairValueAdjustmentInvestmentProperty" xlink:to="lab_ifrs-full_GainsLossesOnFairValueAdjustmentInvestmentProperty" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables_4d61cf0f-a890-4dea-ba93-7adb70850fd7_negatedTerseLabel_es" xlink:label="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ajustes por aumento (disminución) en cuentas por pagar comerciales y otras cuentas por pagar</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:to="lab_ifrs-full_AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DividendsPaid_a5b1afaa-b24f-45a9-87aa-dba51d3c9253_terseLabel_es" xlink:label="lab_ifrs-full_DividendsPaid" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="es">Dividendos reconocidos como distribuciones a los propietarios</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DividendsPaid" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DividendsPaid"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DividendsPaid" xlink:to="lab_ifrs-full_DividendsPaid" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForFinanceIncomeCost_42e127fb-8ec2-4771-8025-0435dd06ddb9_negatedTerseLabel_es" xlink:label="lab_ifrs-full_AdjustmentsForFinanceIncomeCost" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ajustes por ingresos (costes) financieros</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForFinanceIncomeCost" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForFinanceIncomeCost"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForFinanceIncomeCost" xlink:to="lab_ifrs-full_AdjustmentsForFinanceIncomeCost" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_FinanceCosts_e591e4d3-937e-4d2e-bd90-dbce4fc938ca_negatedTerseLabel_es" xlink:label="lab_ifrs-full_FinanceCosts" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Costes financieros</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceCosts" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_FinanceCosts"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_FinanceCosts" xlink:to="lab_ifrs-full_FinanceCosts" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_ProfitLossAttributableToOwnersOfParentMember_label_es" xlink:label="lab_mer_ProfitLossAttributableToOwnersOfParentMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Pérdida atribuible a los propietarios de la empresa matriz [Member]</link:label>
    <link:label id="lab_mer_ProfitLossAttributableToOwnersOfParentMember_documentation_es" xlink:label="lab_mer_ProfitLossAttributableToOwnersOfParentMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">This member stands for a component of equity representing Profit Loss Attributable To Owners Of Parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_ProfitLossAttributableToOwnersOfParentMember" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_ProfitLossAttributableToOwnersOfParentMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_ProfitLossAttributableToOwnersOfParentMember" xlink:to="lab_mer_ProfitLossAttributableToOwnersOfParentMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_CollectionOfDividendsOrRefundsOfIssuancePremiumOfAssociatedCompanies_label_es" xlink:label="lab_mer_CollectionOfDividendsOrRefundsOfIssuancePremiumOfAssociatedCompanies" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Cobro de dividendos o reembolsos de primas de emisión de empresas asociadas.</link:label>
    <link:label id="lab_mer_CollectionOfDividendsOrRefundsOfIssuancePremiumOfAssociatedCompanies_documentation_es" xlink:label="lab_mer_CollectionOfDividendsOrRefundsOfIssuancePremiumOfAssociatedCompanies" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Collection of dividends or refunds of issuance premium of associated companies</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_CollectionOfDividendsOrRefundsOfIssuancePremiumOfAssociatedCompanies" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_CollectionOfDividendsOrRefundsOfIssuancePremiumOfAssociatedCompanies"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_CollectionOfDividendsOrRefundsOfIssuancePremiumOfAssociatedCompanies" xlink:to="lab_mer_CollectionOfDividendsOrRefundsOfIssuancePremiumOfAssociatedCompanies" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_ChangeInFairValueOfAllFinancialInstruments_label_es" xlink:label="lab_mer_ChangeInFairValueOfAllFinancialInstruments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Variación del valor razonable de todos los instrumentos financieros</link:label>
    <link:label id="lab_mer_ChangeInFairValueOfAllFinancialInstruments_documentation_es" xlink:label="lab_mer_ChangeInFairValueOfAllFinancialInstruments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Change in fair value of all financial instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_ChangeInFairValueOfAllFinancialInstruments" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_ChangeInFairValueOfAllFinancialInstruments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_ChangeInFairValueOfAllFinancialInstruments" xlink:to="lab_mer_ChangeInFairValueOfAllFinancialInstruments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PaymentsOfOtherEquityInstruments_972e11ec-0283-484e-b59c-0e85a8fc0f8f_negatedTerseLabel_es" xlink:label="lab_ifrs-full_PaymentsOfOtherEquityInstruments" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Pagos de otros instrumentos de patrimonio</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsOfOtherEquityInstruments" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PaymentsOfOtherEquityInstruments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PaymentsOfOtherEquityInstruments" xlink:to="lab_ifrs-full_PaymentsOfOtherEquityInstruments" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_OtherEquityInstruments_95212bbe-e627-4ed0-ab18-aa9d79bca293_negatedLabel_es" xlink:label="lab_mer_OtherEquityInstruments" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="es">Otros instrumentos de capital</link:label>
    <link:label id="lab_mer_OtherEquityInstruments_label_es" xlink:label="lab_mer_OtherEquityInstruments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Other Equity Instruments</link:label>
    <link:label id="lab_mer_OtherEquityInstruments_documentation_es" xlink:label="lab_mer_OtherEquityInstruments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Other Equity Instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_OtherEquityInstruments" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_OtherEquityInstruments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_OtherEquityInstruments" xlink:to="lab_mer_OtherEquityInstruments" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_DetailedResultOfConsolidationInEquity_label_es" xlink:label="lab_mer_DetailedResultOfConsolidationInEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Resultado desglosado de la consolidación en el patrimonio neto</link:label>
    <link:label id="lab_mer_DetailedResultOfConsolidationInEquity_documentation_es" xlink:label="lab_mer_DetailedResultOfConsolidationInEquity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Detailed result of consolidation in equity</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_DetailedResultOfConsolidationInEquity" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_DetailedResultOfConsolidationInEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_DetailedResultOfConsolidationInEquity" xlink:to="lab_mer_DetailedResultOfConsolidationInEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories_abb0c5cd-d6d2-4ca4-a4a6-7f882891f1c7_negatedTerseLabel_es" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ajustes por disminución (aumento) en inventarios</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInInventories"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:to="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInInventories" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_DisclosureOfChangesInConsolidationPerimeterTextBlock_label_es" xlink:label="lab_mer_DisclosureOfChangesInConsolidationPerimeterTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Divulgación de cambios en el perímetro de consolidación [Text Block]</link:label>
    <link:label id="lab_mer_DisclosureOfChangesInConsolidationPerimeterTextBlock_documentation_es" xlink:label="lab_mer_DisclosureOfChangesInConsolidationPerimeterTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">The disclosure of the changes in the consolidation perimeter.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_DisclosureOfChangesInConsolidationPerimeterTextBlock" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_DisclosureOfChangesInConsolidationPerimeterTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_DisclosureOfChangesInConsolidationPerimeterTextBlock" xlink:to="lab_mer_DisclosureOfChangesInConsolidationPerimeterTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_ShareBasedPayments_label_es" xlink:label="lab_mer_ShareBasedPayments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Pagos basados en acciones</link:label>
    <link:label id="lab_mer_ShareBasedPayments_documentation_es" xlink:label="lab_mer_ShareBasedPayments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Share-based payments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_ShareBasedPayments" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_ShareBasedPayments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_ShareBasedPayments" xlink:to="lab_mer_ShareBasedPayments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions_71db8f92-a5c9-497b-b22b-7a68c1ce6161_totalLabel_es" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="es">Incremento (decremento) por transacciones con acciones propias, patrimonio neto</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughTreasuryShareTransactions" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_bd229c54-181e-4005-a773-0b5d9bd05d68_totalLabel_es" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="es">Incremento (decremento) por transacciones con pagos basados en acciones, patrimonio neto</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_DistributionOfResults_cba49a1f-bc93-4eff-a9d1-ac5bdcdef9a1_netLabel_es" xlink:label="lab_mer_DistributionOfResults" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:type="resource" xml:lang="es">Distribución de resultados</link:label>
    <link:label id="lab_mer_DistributionOfResults_label_es" xlink:label="lab_mer_DistributionOfResults" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Distribution of results</link:label>
    <link:label id="lab_mer_DistributionOfResults_documentation_es" xlink:label="lab_mer_DistributionOfResults" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">The amount of distribution of results</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_DistributionOfResults" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_DistributionOfResults"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_DistributionOfResults" xlink:to="lab_mer_DistributionOfResults" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity_a4fbaf1c-7159-4ac6-a8b7-fa1791be7c52_totalLabel_es" xlink:label="lab_mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="es">Aumento (disminución) por transacciones de pago basadas en acciones Plan de acciones, patrimonio neto</link:label>
    <link:label id="lab_mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity_label_es" xlink:label="lab_mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Increase (decrease) through share-based payment transactions Stock Plan, equity</link:label>
    <link:label id="lab_mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity_documentation_es" xlink:label="lab_mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">The increase (decrease) in equity resulting from share-based payment transactions. [Refer: Equity]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity" xlink:to="lab_mer_IncreaseDecreaseThroughShareBasedPaymentTransactionsStockPlanEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_PurchaseOfInvestmentProperty_1e388bdf-90c7-42cb-976e-3b7855db5575_negatedTerseLabel_es" xlink:label="lab_ifrs-full_PurchaseOfInvestmentProperty" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Compra de inmuebles de inversión</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PurchaseOfInvestmentProperty" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_PurchaseOfInvestmentProperty"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_PurchaseOfInvestmentProperty" xlink:to="lab_ifrs-full_PurchaseOfInvestmentProperty" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_CancellationOfInterestRateDerivatives_label_es" xlink:label="lab_mer_CancellationOfInterestRateDerivatives" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Cancelación de derivados sobre tipos de interés</link:label>
    <link:label id="lab_mer_CancellationOfInterestRateDerivatives_documentation_es" xlink:label="lab_mer_CancellationOfInterestRateDerivatives" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Cancellation of interest rate derivatives</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_CancellationOfInterestRateDerivatives" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_CancellationOfInterestRateDerivatives"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_CancellationOfInterestRateDerivatives" xlink:to="lab_mer_CancellationOfInterestRateDerivatives" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_ProceedsAndPaymentsFromFinancialLiabilities_b019516c-3db0-45fc-8cf6-79f502920fac_totalLabel_es" xlink:label="lab_mer_ProceedsAndPaymentsFromFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="es">Ingresos y pagos de pasivos financieros</link:label>
    <link:label id="lab_mer_ProceedsAndPaymentsFromFinancialLiabilities_label_es" xlink:label="lab_mer_ProceedsAndPaymentsFromFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Proceeds and payments from financial liabilities</link:label>
    <link:label id="lab_mer_ProceedsAndPaymentsFromFinancialLiabilities_documentation_es" xlink:label="lab_mer_ProceedsAndPaymentsFromFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Proceeds and payments from financial liabilities</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_ProceedsAndPaymentsFromFinancialLiabilities" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_ProceedsAndPaymentsFromFinancialLiabilities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_ProceedsAndPaymentsFromFinancialLiabilities" xlink:to="lab_mer_ProceedsAndPaymentsFromFinancialLiabilities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss_4b9a099d-9c23-46e6-8c0b-db149c9a33e1_negatedLabel_es" xlink:label="lab_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="es">Impuesto sobre las ganancias relativo a componentes de otro resultado global que no se reclasificarán en resultados</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss" xlink:to="lab_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLoss" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_EmployeeBenefitsExpense_aed60ae6-b27e-4fef-ad9b-cf1e18cf5038_negatedTerseLabel_es" xlink:label="lab_ifrs-full_EmployeeBenefitsExpense" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Gastos por prestaciones a los empleados</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EmployeeBenefitsExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_EmployeeBenefitsExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_EmployeeBenefitsExpense" xlink:to="lab_ifrs-full_EmployeeBenefitsExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxContinuingOperations_label_es" xlink:label="lab_mer_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Otros ingresos integrales que se reclasificarán a la cuenta de resultados neta de impuestos de las operaciones continuadas</link:label>
    <link:label id="lab_mer_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxContinuingOperations_documentation_es" xlink:label="lab_mer_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Other comprehensive income that will be reclassified to profit or loss net of tax continuing operations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxContinuingOperations" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxContinuingOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxContinuingOperations" xlink:to="lab_mer_OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxContinuingOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_DisclosureOfEnvironmentRelatedInformationTextBlock_label_es" xlink:label="lab_mer_DisclosureOfEnvironmentRelatedInformationTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Divulgación de información relacionada con el medio ambiente [Text Block]</link:label>
    <link:label id="lab_mer_DisclosureOfEnvironmentRelatedInformationTextBlock_documentation_es" xlink:label="lab_mer_DisclosureOfEnvironmentRelatedInformationTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Disclosure of environment related information</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_DisclosureOfEnvironmentRelatedInformationTextBlock" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_DisclosureOfEnvironmentRelatedInformationTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_DisclosureOfEnvironmentRelatedInformationTextBlock" xlink:to="lab_mer_DisclosureOfEnvironmentRelatedInformationTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity_66836c0c-7232-4f67-b599-4cd3eeed6ff9_totalLabel_es" xlink:label="lab_ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="es">Incremento (decremento) por otros cambios, patrimonio neto</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:to="lab_ifrs-full_IncreaseDecreaseThroughTransfersAndOtherChangesEquity" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_IncreaseDecreaseInWorkingCapital_7820f5ad-fddc-4a0d-953f-17d4beabdf3f_negatedTotalLabel_es" xlink:label="lab_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="es">Aumento (disminución) del capital circulante</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_IncreaseDecreaseInWorkingCapital"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:to="lab_ifrs-full_IncreaseDecreaseInWorkingCapital" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_DisclosureOfClimateChangeManagementTextBlock_label_es" xlink:label="lab_mer_DisclosureOfClimateChangeManagementTextBlock" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Divulgación de la gestión del cambio climático [Text Block]</link:label>
    <link:label id="lab_mer_DisclosureOfClimateChangeManagementTextBlock_documentation_es" xlink:label="lab_mer_DisclosureOfClimateChangeManagementTextBlock" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Disclosure of climate change management</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_DisclosureOfClimateChangeManagementTextBlock" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_DisclosureOfClimateChangeManagementTextBlock"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_DisclosureOfClimateChangeManagementTextBlock" xlink:to="lab_mer_DisclosureOfClimateChangeManagementTextBlock" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_TreasuryShares_660cf1a7-9cc2-48f5-a8b0-dee6e53ff2c8_negatedTerseLabel_es" xlink:label="lab_ifrs-full_TreasuryShares" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Acciones propias</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TreasuryShares" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_TreasuryShares"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_TreasuryShares" xlink:to="lab_ifrs-full_TreasuryShares" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables_53ebc752-195e-4e4a-9fcf-8de2614b4fbe_negatedTerseLabel_es" xlink:label="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ajustes por disminución (aumento) en cuentas por cobrar comerciales y otras cuentas por cobrar</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:to="lab_ifrs-full_AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations_76c2f12b-0a69-4e61-bfa6-96cc6e652df8_negatedTotalLabel_es" xlink:label="lab_mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="es">Aumento (disminución) en efectivo y equivalentes de efectivo, operaciones continuadas</link:label>
    <link:label id="lab_mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations_label_es" xlink:label="lab_mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Increase (decrease) in cash and cash equivalents, continuing operations</link:label>
    <link:label id="lab_mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations_documentation_es" xlink:label="lab_mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Increase (decrease) in cash and cash equivalents, continuing operations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations" xlink:to="lab_mer_IncreaseDecreaseInCashAndCashEquivalentsContinuingOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_DisclosureOfIncomeAndExpense_label_es" xlink:label="lab_mer_DisclosureOfIncomeAndExpense" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Divulgación de ingresos y gastos [Text Block]</link:label>
    <link:label id="lab_mer_DisclosureOfIncomeAndExpense_documentation_es" xlink:label="lab_mer_DisclosureOfIncomeAndExpense" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Disclosure of income and expense</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_DisclosureOfIncomeAndExpense" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_DisclosureOfIncomeAndExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_DisclosureOfIncomeAndExpense" xlink:to="lab_mer_DisclosureOfIncomeAndExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty_5b493612-4b0d-4eb6-af26-029397574d8e_negatedTerseLabel_es" xlink:label="lab_ifrs-full_AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ajustes por ganancias (pérdidas) en el ajuste del valor razonable, inversiones inmobiliarias</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty" xlink:to="lab_ifrs-full_AdjustmentsForGainsLossesOnFairValueAdjustmentInvestmentProperty" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_CashFlowsFromUsedInOperations_d4a19c54-1b05-44a5-bc29-4355a1360319_negatedTotalLabel_es" xlink:label="lab_ifrs-full_CashFlowsFromUsedInOperations" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="resource" xml:lang="es">Flujos de efectivo procedentes de (utilizados en) operaciones</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsFromUsedInOperations" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_CashFlowsFromUsedInOperations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_CashFlowsFromUsedInOperations" xlink:to="lab_ifrs-full_CashFlowsFromUsedInOperations" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities_f704da57-5510-4ff9-8813-b9553b47b6f1_negatedTerseLabel_es" xlink:label="lab_ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ingresos procedentes de préstamos</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:to="lab_ifrs-full_ProceedsFromBorrowingsClassifiedAsFinancingActivities" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_DepreciationAndAmortisationExpense_221e252c-28c6-452d-b60b-82b38dab5320_negatedTerseLabel_es" xlink:label="lab_ifrs-full_DepreciationAndAmortisationExpense" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Gastos por amortización</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationAndAmortisationExpense" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_DepreciationAndAmortisationExpense" xlink:to="lab_ifrs-full_DepreciationAndAmortisationExpense" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_ProceedsFromSalesOfInvestmentProperty_f99da861-9f27-45ec-84c3-9100037dd6aa_negatedTerseLabel_es" xlink:label="lab_ifrs-full_ProceedsFromSalesOfInvestmentProperty" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ingresos por ventas de propiedades de inversión</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromSalesOfInvestmentProperty" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_ProceedsFromSalesOfInvestmentProperty"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_ProceedsFromSalesOfInvestmentProperty" xlink:to="lab_ifrs-full_ProceedsFromSalesOfInvestmentProperty" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_SubtotalNonCurrentFinancialAssets_40b3be85-8686-4515-9d63-5dfc8b810a20_totalLabel_es" xlink:label="lab_mer_SubtotalNonCurrentFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="es">Subtotal activos financieros no corrientes</link:label>
    <link:label id="lab_mer_SubtotalNonCurrentFinancialAssets_label_es" xlink:label="lab_mer_SubtotalNonCurrentFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Subtotal non current financial assets</link:label>
    <link:label id="lab_mer_SubtotalNonCurrentFinancialAssets_documentation_es" xlink:label="lab_mer_SubtotalNonCurrentFinancialAssets" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Subtotal non current financial assets</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_SubtotalNonCurrentFinancialAssets" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_SubtotalNonCurrentFinancialAssets"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_SubtotalNonCurrentFinancialAssets" xlink:to="lab_mer_SubtotalNonCurrentFinancialAssets" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_ResultOfThePurchaseOrSaleOfOwnSharesForEquityInstruments_label_es" xlink:label="lab_mer_ResultOfThePurchaseOrSaleOfOwnSharesForEquityInstruments" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Resultado de la compra o venta de acciones propias por instrumentos de capital</link:label>
    <link:label id="lab_mer_ResultOfThePurchaseOrSaleOfOwnSharesForEquityInstruments_documentation_es" xlink:label="lab_mer_ResultOfThePurchaseOrSaleOfOwnSharesForEquityInstruments" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Result of the purchase or sale of own shares for equity instruments</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_ResultOfThePurchaseOrSaleOfOwnSharesForEquityInstruments" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_ResultOfThePurchaseOrSaleOfOwnSharesForEquityInstruments"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_ResultOfThePurchaseOrSaleOfOwnSharesForEquityInstruments" xlink:to="lab_mer_ResultOfThePurchaseOrSaleOfOwnSharesForEquityInstruments" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_RepaymentsOfBondsNotesAndDebentures_022fd8d7-9345-4f55-89eb-c744077c1f4d_negatedTerseLabel_es" xlink:label="lab_ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Reembolsos de obligaciones con y sin garantía y pagarés</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_RepaymentsOfBondsNotesAndDebentures"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:to="lab_ifrs-full_RepaymentsOfBondsNotesAndDebentures" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_ProfitLossAttributableToOwnersOfTheParent_label_es" xlink:label="lab_mer_ProfitLossAttributableToOwnersOfTheParent" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Beneficio (pérdida) atribuible a los propietarios de la sociedad matriz</link:label>
    <link:label id="lab_mer_ProfitLossAttributableToOwnersOfTheParent_documentation_es" xlink:label="lab_mer_ProfitLossAttributableToOwnersOfTheParent" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Profit (loss) attributable to owners of the parent</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_ProfitLossAttributableToOwnersOfTheParent" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_ProfitLossAttributableToOwnersOfTheParent"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_ProfitLossAttributableToOwnersOfTheParent" xlink:to="lab_mer_ProfitLossAttributableToOwnersOfTheParent" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_OtherEquityHolderContributions_label_es" xlink:label="lab_mer_OtherEquityHolderContributions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Otras aportaciones de los accionistas</link:label>
    <link:label id="lab_mer_OtherEquityHolderContributions_documentation_es" xlink:label="lab_mer_OtherEquityHolderContributions" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Other equity holder contributions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_OtherEquityHolderContributions" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_OtherEquityHolderContributions"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_OtherEquityHolderContributions" xlink:to="lab_mer_OtherEquityHolderContributions" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_InterimDividendMember_label_es" xlink:label="lab_mer_InterimDividendMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Dividendo provisional [Member]</link:label>
    <link:label id="lab_mer_InterimDividendMember_documentation_es" xlink:label="lab_mer_InterimDividendMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">This member stands for the interim dividends.</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_InterimDividendMember" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_InterimDividendMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_InterimDividendMember" xlink:to="lab_mer_InterimDividendMember" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_OtherEquityHolderContributionsMember_label_es" xlink:label="lab_mer_OtherEquityHolderContributionsMember" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Otras aportaciones de los accionistas [Member]</link:label>
    <link:label id="lab_mer_OtherEquityHolderContributionsMember_documentation_es" xlink:label="lab_mer_OtherEquityHolderContributionsMember" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Other equity holder contributions</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_OtherEquityHolderContributionsMember" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_OtherEquityHolderContributionsMember"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_OtherEquityHolderContributionsMember" xlink:to="lab_mer_OtherEquityHolderContributionsMember" xlink:type="arc" order="1"/>
    <link:label id="lab_ifrs-full_AdjustmentsForFinanceIncome_d8e3df1a-1d50-4ea8-956c-8d9e71f5b86d_negatedTerseLabel_es" xlink:label="lab_ifrs-full_AdjustmentsForFinanceIncome" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="es">Ajustes por ingresos financieros</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForFinanceIncome" xlink:href="https://xbrl.ifrs.org/taxonomy/2024-03-27/full_ifrs/full_ifrs-cor_2024-03-27.xsd#ifrs-full_AdjustmentsForFinanceIncome"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ifrs-full_AdjustmentsForFinanceIncome" xlink:to="lab_ifrs-full_AdjustmentsForFinanceIncome" xlink:type="arc" order="1"/>
    <link:label id="lab_mer_PerimeterVariations_7e1457d5-15b8-49e8-b46a-b7264c8a8ce2_totalLabel_es" xlink:label="lab_mer_PerimeterVariations" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="es">Variaciones del perímetro</link:label>
    <link:label id="lab_mer_PerimeterVariations_label_es" xlink:label="lab_mer_PerimeterVariations" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="es">Perimeter variations</link:label>
    <link:label id="lab_mer_PerimeterVariations_documentation_es" xlink:label="lab_mer_PerimeterVariations" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="es">Perimeter variations</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_mer_PerimeterVariations" xlink:href="959800L8KD863DP30X04-2025-12-31.xsd#mer_PerimeterVariations"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mer_PerimeterVariations" xlink:to="lab_mer_PerimeterVariations" xlink:type="arc" order="1"/>
  </link:labelLink>
</link:linkbase>
