See also:

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. ...

Back button
Press briefly: - Back - Switches off the Voice Control System - Hides display messages or calls up the last Trip menu function used - Exits the telephone book/redial memory ...

Floormat on the driver's side
WARNING Whenever you are using a floormat, make sure there is enough clearance and that the floormat is securely fastened. The floormat should always be securely fastened using the fastening ...