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How to Replace the Key Fob Battery for the Mercedes C-Class?

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

To replace the key fob battery for the Mercedes C-Class, remove the emergency key from the bottom of the fob along with the cover. Once these are removed, pry off the plastic from the back of the fob. Underneath, you will find the battery, which can be taken out of its housing and replaced with a new replacement part. After replacing the battery, reattach the back cover of the fob and insert the key.

Updated on 2 June 2026 by ScegliAuto

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