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Remote Key Battery Replacement

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

Video tutorial
Detailed instructions - To replace the battery in the remote key, you do not need to separate the two halves; simply extract the interior of the remote after first removing the metal key (blade) stored inside: unlock the latch and pull out the key; then press on the rear tabs and remove the interior of the remote where the electronic circuit and battery are housed; remove the old batteries and insert the new ones, respecting the polarity orientation, and reassemble the remote key, verifying its proper function.

Updated on 8 February 2026 by ScegliAuto


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