Select: Function selector button CAR > control button (Car)* Systems > Driver assist > Parking aid > Switch-over front/rear > auto or manual.
auto - the rear view (directly behind the vehicle) is automatically shown when you select reverse gear. The front view (directly in front of the vehicle) is automatically shown when you select a forward gear.
manual - the rear view (directly behind the vehicle) is always shown when you switch on the system; the front view is not automatically shown when you select a forward gear.