Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

How to Replace the Key Fob Battery of a Mercedes S-Class

Model: Mercedes Classe S W221, MK 5 - Years: 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
Part: Key

See other generations:
Video tutorial

How do you replace the battery in the key fob of a Mercedes S-Class? Let's see how to do it in this video. Take your key fob and use a screwdriver to pry between the key cover and the plastic cap on top of the cover (where the battery holder is located).

Pry until the cap separates from the cover, then extract the worn battery with a screwdriver, take a new one of the same size and voltage. Reassemble the battery holder in the key fob cover until you hear it click into place.

Check the proper functioning of the key fob by testing the door lock and unlock buttons.


Updated on 12 March 2026 by ScegliAuto


Related tutorials

How to Replace the Dead Battery in a Mercedes S-Class Key Fob
How to Replace the Dead Battery in a Mercedes S-Class Key Fob
Mercedes Classe S (2005-2013 / W221, MK 5) .. how to change the dead battery in a Mercedes S-Class key fob. Take your ignition remote and remove the metal key. Once the metal key is removed, use.. …
How to Replace the Remote Battery for the Mercedes S-Class?
How to Replace the Remote Battery for the Mercedes S-Class?
Mercedes Classe S (2005-2013 / W221, MK 5) .. the battery in the remote for the Mercedes S-Class, pry open the bottom of the device to detach the chrome cover of the remote. Once this cover is.. …
How to replace the remote battery in the Mercedes S-Class?
How to replace the remote battery in the Mercedes S-Class?
Mercedes Classe S (2013-2020 / MK 6, W222) .. To replace the battery in the Mercedes S-Class remote, slide the key out from its housing located at the top of the remote. Once the key is removed,.. …

Other guides you may be interested in

How to reset the tyre pressure warning light on the Kia Niro EV?

To reset the tyre pressure warning light on the Kia Niro EV, inflate the tyres until they reach the correct pressure value. This value is indicated on the sticker attached to the driver's door pillar. Once the tyres are inflated, turn on the instrument cluster to check that the warning light has completely disappeared from the display. If it is still present, you may need to drive for a few miles to ensure it disappears completely from the screen.

Watch the video!


by ScegliAuto

More videos