See also:

Activating/deactivating PRE-SAFE® Brake
PRE-SAFE® Brake is only available in vehicles with DISTRONIC PLUS. – Press the or button on the steering wheel to select the DriveAssist menu. – Press or to select PRE-SAFE Brake. – P ...

Safety
Standard features include antilock brakes, an electronic stability system, front and rear side-impact airbags, side curtain airbags and Pre-Safe. By monitoring the braking, steering and stability ...

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. - ...