See also:

Cleaning the brake discs
Coatings of dirt and water on the brake discs may result in delayed brake function. This delay is minimized by cleaning the brake linings. Cleaning the brake pads is advisable in wet weather, prior ...

Summary
The camera is activated when the gear selector is moved to R (this can be changed in the MY CAR menu) and the image is shown on the center console display. When backing up, two solid lines are ...

Input volume
Adjust the input volume in the RSE menu, under A/V AUX input volume. ...