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Replacing the Battery in a Mercedes C-Class Key Fob

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

In this video, we will detail how to replace the battery in a Mercedes C-Class key fob. Take your ignition remote and remove the metal key. Once the metal key is removed, insert it into the slot of the plastic key fob and press inward. When you hear a click, it means the cover is open. Use a small screwdriver to remove the dead battery, take a new one (same size and voltage), and replace it. Reassemble the key fob cover by pressing down until you hear it click into place. Check that it functions correctly.

Updated on 27 February 2026 by ScegliAuto

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