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:
Notes on driving
- If the vehicle is heavily laden, check the tire
pressures and correct them if necessary.
- When parking your vehicle, make sure that
the tires do not get deformed by the curb
or other obstacl ...
Switching on/off
The three red indicator lamps in the button indicate the heating level you have
selected.
If the battery voltage is too low, the seat heating may switch off.
Driver's and front-passenger ...
Smaller tank, same range
Because the new Mercedes CLS models consume significantly less fuel, it has
been possible to reduce the filling volume of the fuel tank in the four and
six-cylinder models to 59 litres. The 80-lit ...
