See also:

Adjusting the head restraint height electrically
To adjust the head restraint height: slide the switch for head restraint adjustment () up or down in the direction of the arrow. ...

General notes
WARNING All categories of messages contain important information which should be taken note of and, where a malfunction is indicated, addressed as soon as possible at an authorized Mercedes- ...

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. ...