See also:

Problems with the steering wheel heating
The steering wheel heating has switched off prematurely or cannot be switched on. The vehicle's electrical system voltage is too low because too many electrical consumers are switched on. - S ...

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 ...

Charging the battery
WARNING Never charge a battery still installed in the vehicle unless a battery charger unit approved by Mercedes-Benz is being used. Gases may escape during charging and cause explosions ...