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How to Replace the Key Battery for the Mercedes W205

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

To replace the battery inside your Mercedes C-Class W205 key, follow this step-by-step guide. You only need a new CR2025 button battery. Start by taking the car key, then remove the emergency key from inside the cover and use it to take apart the cover. Next, locate the dead battery and replace it with the new one. Once done, reassemble the protective cover, and the procedure is successfully completed.

Posted on 9 February 2026 by ScegliAuto

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