Changing the battery
You require a CR 2025 3 V cell battery.
•► Take the mechanical key out of the SmartKey

•► Press mechanical key 2 into the opening in the SmartKey in the direction of the arrow until battery tray cover 1 opens.
When doing so, do not hold cover 1 shut.
•► Remove battery tray cover 1.

•► Repeatedly tap the SmartKey against your palm until battery 3 falls out.
•► Insert the new battery with the positive terminal facing upwards. Use a lint-free cloth to do so.
•► Make sure that the surface of the battery is free from lint, grease and all other forms of contamination.
•► Insert the front tabs of battery tray cover 1 and then press to close it.
•► Insert the mechanical key into the SmartKey.
•► Check the function of all SmartKey buttons on the vehicle.
See also:
Stately Design
Redesigned for 2007, the S-Class has always been a handsome, if conservative,
car. For 2010, a few visual updates give it a more assertive presence, which is
a welcome change. The bumpers get a mo ...
Useful information
This Operator's Manual describes all models and all standard and optional equipment
of your vehicle available at the time of publication of the Operator's Manual. Country-specific
diffe ...
Locking and unlocking centrally
The SmartKey centrally locks/unlocks:
• the doors
• the trunk lid
• the fuel filler flap
1 Locks the vehicle
2 Unlocks the trunk lid
3 Unlocks the vehicle
When unlocking, the tur ...
