Mercedes-Benz GLC : Vehicles with Parking Assist PARKTRONIC / System failure
If the rear view camera is not operational, the
following display appears in the multimedia system.

The following camera views are available in the
multimedia system:
Normal view
Yellow lanes marking the course
the tires
will take with the current steering angle
(dynamic)
Yellow guide line, vehicle
width (driven surface)
depending on the current steering
angle (dynamic)
Red guide line at a distance of
approximately
1...
The rear view camera will not function or will
only partially function in the following situations:
The tailgate is open.
There is heavy rain, snow or fog...
Other information:
The parking position makes parking easier.
The front-passenger outside mirror will swivel
downwards in the direction of the rear wheel on
the front passenger's side when:
The parking position is stored.
The front-passenger mirror is selected.
Reverse gear is engaged...
Plug-in hybrid: be sure to observe the notes in
the Supplement. You could otherwise fail to recognize
dangers.
NOTE Damage from automatic braking
If one of the following functions is switched
on, the vehicle brakes automatically in certain
situations:
Active Brake Assist
Active Distance Assist DISTRONIC
HOLD function
Active Parking Assist
To avoid damage to the vehicle, deactivate
these systems in the following or similar situations:
During towing
In a car wash
Mercedes-Benz recommends transporting your
vehicle in the case of a breakdown, rather than
towing it away...