See also:

Malfunction
In the event of a failure or malfunction of the parking brake, secure the vehicle against rolling using a wheel chock, for example, when leaving it. ...

Radar sensors
The radar sensors are located under the rear bumper. The system may not be fully functional in the following situations: Dirty or icy bumper. Stickers on the bumper. A Check Control me ...

Interior motion sensor
For the sensor to function properly, the windows and glass sunroof/panoramic glass sunroof must be closed. ...