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:
Vanity mirror in the sun visor
Mirror light 1 only functions if the sun visor
is clipped into retainer 2 and mirror cover
5 has been folded up. ...
Haven of calm: optimum vibration and acoustic comfort
The new M-Class promises relaxed and therefore safe motoring under all
possible (and even impossible) conditions. By paying close attention to detail
every step of the way, the development enginee ...
Vehicle
Display messages
Possible causes/consequences and
Solutions
You have attempted to start the engine with the transmission in
position R or D.
Shift the transmissio ...