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:
The Strong, Silent Type
The S-Class is available with a range of V-8 and V-12 engines that produce
from 382 horsepower in the V-8 S550 up to 604 hp in the ultimate-bragging-rights
sedan: the S65 AMG with a twin-turbo V-1 ...
Tread
The part of the tire that comes into contact
with the road. ...
Driving systems
Display messages
Possible causes/consequences and •► Solutions
Attention Assist:
Pause!
Based on specific criteria, ATTENTION ASSIST has determined that
the driver is tired ...
