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How to Replace the Remote Battery of the Mercedes-Benz Class B

Model: Mercedes Classe B W245, MK 1 - Years 2005-2011
Part: Key

In this video, you will see how to replace the exhausted keyless remote battery of the first generation Mercedes-Benz Class B. You will need a CR 2025, 3V battery. Start by extracting the metal key contained within the remote casing. Use this to lever open the compartment that holds the battery. Remove the old battery and replace it with the new one. Once this is done, test the remote to ensure it works correctly. As shown, this is a simple and quick operation that can be done independently.

Updated on 29 May 2026 by ScegliAuto

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