See also:

The concept
The Check Control monitors vehicle functions and alerts you to any malfunctions in the systems monitored. A Check Control message consists of indicator and warning lamps in the instrument clust ...

Activating HDC
Press the button; the LED above the button lights up. ...

Air volume, manual
You can vary the air volume by pressing on the corresponding side. You can reactivate the automatic mode for the air flow rate with the AUTO button. ...