See also:

Cleaning the steering wheel and gear or selector lever
– Thoroughly wipe with a damp cloth or use leather care agents that have been recommended and approved by Mercedes- Benz. ...

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. ...

Emergency braking
The vehicle can also be braked during an emergency using the electric parking brake. – While driving, push handle 1 of the electric parking brake. The vehicle is braked as long as you keep ...