See also:

What to do if...
Only a black screen is visible. Switch on the system. There are no options available on the screen. Switch over between the display screens. Radio stations or TV channels are grayed out ...

Diagnosis OBD
On the driver's side is an OBD socket for checking components relevant to the composition of the vehicle's emissions. ...

Active seat ventilation, front
The seat cushion and backrest surfaces are cooled by means of integrated fans. The ventilation rapidly cools the seat, e. g., if the vehicle interior is overheated or for continuous cooling at ...