See also:

General notes
If you cannot lock or unlock the vehicle with the SmartKey, either the battery in the SmartKey is discharged, the SmartKey is faulty or the starter battery is discharged. - Check the battery in ...

Notes on technical data
The data stated here specifically refers to a vehicle with standard equipment. Consult an authorized Mercedes-Benz Center for the data for all vehicle variants and trim levels. ...

Activating/deactivating ATTENTION ASSIST
Press the or button on the steering wheel to select the DriveAssist menu. Press the or button to select Attention Asst.. Press . The current selection is displayed. To activate/ ...