See also:

Setting the interior/exterior lighting delayed switch-off time
Interior lighting: you can set whether and for how long you wish the interior lighting to remain on in the dark after you have removed the SmartKey from the ignition lock. Exterior light: you c ...

Washing by hand
Carefully remove all deposits of road salt as soon as possible when driving in winter. Also, clean the insides of the wheels when washing the underbody of the vehicle. ► Do not use hot wat ...

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. ...