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How to Change the Remote Battery on a Mercedes C-Class

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

How do you change the battery in your Mercedes C-Class key remote? Let's see how to do it in this video. Take the car ignition key and pull out the metal key from the housing. Insert the key into the slot and press at the right spot until the plastic battery holder pops up from the key (remove the circuit board if it needs to be replaced). Remove the dead battery and insert the new one into the battery holder; close the battery holder in the key remote and finally insert the metal key. Test the functionality of the remote key.

Updated on 15 March 2026 by ScegliAuto

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