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How to Replace the Key Battery for the Mercedes-Benz C-Class

Model: Mercedes Classe C W203 - Years 2000-2007
Part: Key

It may happen that suddenly the remote for your vehicle stops working, almost certainly due to a dead battery. This video tutorial shows how to replace it by following the steps described below: Remove the key from the remote by disengaging the latch, and use it to pry open the designated slot until you see the electronic circuit board where the battery is located. Gently extract the battery and replace it with one of the same specifications; there is an identification code engraved on the back to avoid mistakes. Job complete.

Updated on 9 August 2026 by ScegliAuto

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