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How to Change the Battery in the Mercedes C-Class Key Fob

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

Let's see in this short video how to disassemble and replace the battery in the Mercedes C-Class key fob by following these simple steps. First, take the key fob in hand and start by removing the physical key from inside by sliding it out; then remove the battery tray found inside, as shown in the video. At this point, remove and replace the old batteries with new ones of the correct type; insert them in the correct orientation and reassemble everything on the tray, finally putting the key fob back together!

Updated on 21 June 2026 by ScegliAuto

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