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How to Disassemble the Key and Replace the Battery of the Mercedes C-Class

Model: Mercedes Classe C W205 - Years 2014-2021
Part: Key

Follow this guide to disassemble the remote key and replace the battery for the Mercedes C-Class with these simple and quick steps. First, take your remote and remove the physical key from inside it; then, pry open the slot to remove the back cover of the remote, as shown in the video. At this point, replace the battery with a new one of the correct type (in this case, a CR 2025 3V); insert it in the correct orientation and install the back cover of the remote!

Updated on 16 June 2026 by ScegliAuto

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