See also:

Limitations
Strong sunlight, reflections, extreme light contrasts, the use of sunglasses, or if the driver is not looking straight ahead may make the visual warning signal in the windshield difficult to see. ...

Signals from the park assist system
View in the display (warning for objects front left/ right rear) ...

RSE front screen menus
To access this menu, begin by selecting RSE under MEDIA by pressing this button on the front center console (or by using the remote control or the steering wheel keypad). Continue by pressing ...