See also:

Problems with the SmartKey
Problem Possible causes/consequences and  Solutions You cannot lock or unlock the vehicle using the SmartKey. The SmartKey battery is discharged or nearly discharged ...

Snow chains
For safety reasons, Mercedes-Benz recommends that you only use snow chains which have been specially approved for your vehicle by Mercedes-Benz, or are of a corresponding standard of quality. ...

Shifting to neutral N
- When the vehicle is stationary, depress the brake pedal. - Push the DIRECT SELECT lever up or down to the first point of resistance. If the engine has been switched off, the automatic transm ...