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How to Replace the Key Battery for the Mercedes S550

Model: Mercedes Classe S W222, MK 6 - Years 2013-2020
Part: Key

If you need to replace the remote key battery on this vehicle, follow the instructions and procedure outlined below. You can also check the video. First, extract the emergency key. Use the same key to pry open the slot on the side to release the rear cover. At this point, you will have access to the battery compartment. Remove the old battery and replace it with the new one, ensuring the polarity remains the same. Close the cover and reinsert the emergency key.

Updated on 19 July 2026 by ScegliAuto

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