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How to Replace the Thermostat in a Mercedes A-Class

Model: Mercedes Classe A - Years: 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
Part: Thermostat

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Video tutorial

To replace the thermostat on a Mercedes A-Class, turn off the engine and wait for it to cool completely. Open the hood and remove any covers and components that obstruct access to the thermostat.

After draining the coolant into a container, locate the hoses connected to the thermostat assembly and loosen the clamps. Disconnect the hoses and any electrical connectors, remove the fasteners, and extract the thermostat from its housing.

Install the replacement with new gaskets and reassemble the components that were removed. Finally, fill the system with coolant that meets Mercedes specifications, bleed the air, and check for leaks.


Posted on 9 November 2026 by ScegliAuto


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by ScegliAuto

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