See also:

Back button
1 Back button To exit the menu: press back button 1 briefly. COMAND changes to the next higher menu level in the current operating mode. You can also exit a menu by sliding or the CO ...

Removing the towing eye
  Loosen the towing eye and unscrew it.   Attach cover 1 to the bumper and press until it engages.   Place the towing eye in the vehicle tool kit. ...

Charging the batter
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 explosio ...