See also:

Cleaning the sensors
Location of the front sensors Location of the rear sensors The sensors must be cleaned regularly to ensure that they work properly. Clean them with water and a suitable car washing detergent. ...

DSTC system
The Dynamic Stability and Traction Control system (DSTC) ...

Activating/deactivating
The control panel is activated by pressing MODE when the audio system is switched on. It is switched off automatically when the audio system is switched off or by a long press on MODE. ...