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How to Replace the Key Battery of the Mercedes C-Class W204

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

This video shows how to replace the remote key battery of the Mercedes C-Class. To work correctly, you need nothing but the Mercedes C-Class remote key. Press the button located at the top of the black part of the key remote. At this point, you can extract the blade located inside; this key will help you perform a second maneuver to remove the battery holder. As shown in the video, insert one end of the blade into the key remote and push down; this maneuver allows you to slide out the battery holder. Once removed, proceed to replace the two batteries with two functioning ones; the new batteries must be identical to the original. Reassemble by reversing the steps. Finally, test the operation.

Updated on 20 May 2026 by ScegliAuto

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