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How to Replace the Battery and Cover of a Mercedes C-Class Key Fob

Model: Mercedes Classe C W204 - Years 2007-2013
Part: Key

Replacing the battery and cover of a Mercedes C-Class key fob? Here's how to do it: Take your key fob and slide the button to release the metal key. Once the key is out, use a lever to pry the battery holder from the cover (as shown in the video). Remove the battery from the compartment (after separating the two halves of the cover), take a new one of the same size and voltage. Reinstall the plastic battery holder into the key fob cover, and finally insert the metal key back into the cover. Check that the key fob works correctly.

Updated on 9 March 2026 by ScegliAuto

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