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. ...

Checking tire pressure electronically
– Make sure that the SmartKey is in position 2 in the ignition lock. – Press the or button on the steering wheel to select the Serv. menu. – Press the or button to select Tire Pressure. ...

Cleaning the seat belts
  Use clean, lukewarm water and soap solution. Do not clean the seat belts using chemical cleaning agents. Do not dry the seat belts by warming them above 176 °F (80 °C) or placing th ...