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How to Open the Mercedes S-Class When the Battery is Dead?

Model: Mercedes Classe S W221, MK 5 - Years 2005-2013
Part: Checks and maintenance

When the battery of the Mercedes S-Class is dead, it will be impossible to open the car using the button on the remote. Therefore, you will need to remove the emergency key located inside the remote, which can be extracted from its housing by sliding it out from the bottom of the device. This way, the emergency key can be inserted into the car's lock, turned, and all the door locks will be unlocked. The same procedure can be used to lock all the doors of the car.

Updated on 17 June 2026 by ScegliAuto

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