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Disassembly and Replacement of Mercedes C-Class Key Battery

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

In this guide, you will learn how to replace the battery in the remote key of a Mercedes C-Class. First, remove the internal key by pulling the small black lever located at the corner of the key. Then, insert the key into the slot to remove the internal body of the key, as shown in the video. At this point, access the batteries (there are two in this case): remove them and replace them. Be very careful not to reverse the polarity: reinstall them in the correct direction and choose only long-lasting, high-quality batteries!

Updated on 19 March 2026 by ScegliAuto

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