See also:

Cup holder in the rear seat armrest
Do not sit on or support your body weight on the rear seat armrest when it is folded down, as you could otherwise damage it. Close the cup holder before folding the rear seat armrest up. ...

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. ...

Setting the airflow
Turn the SmartKey to position 2 in the ignition lock. To increase/reduce: press the or button. ...