See also:

Adjusting the lumbar support
You can adjust the lumbar support using COMAND. ...

Storing and maintaining the currentspeed
You can store the current speed if you are driving faster than 20 mph (30 km/h). ► Accelerate the vehicle to the desired speed. ► Briefly press the cruise control lever up 1 or down ...

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. ...