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. ...

Using the rear center seat belt
If the left-hand rear seat backrest is folded down and back up again, the rear center seat belt may lock. The seat belt can then not be pulled out. To release the rear center seat belt: pull out ...

Adjusting the multicontour seat
You can adjust the contour of the front seats individually so as to provide optimum support for your back and sides. ► Make sure that the SmartKey is in position 2 in the ignition lock. ...