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:
WARNING Risk of injury or death due to
modifications to the restraint system
Vehicle occupants may no longer be protected
as intended if alterations are made to the
restraint system.
Never alter the parts of the restraint system.
Never tamper with the wiring or any electronic component parts or their software...
The automatic front passenger airbag shutoff is
able to detect whether the front passenger seat
is occupied by a person or a child restraint system.
The front passenger airbag is enabled or
disabled accordingly.
WARNING Risk of injury or death due to
objects under the co-driver seat
Objects trapped under the co-driver seat can
interfere with the function of the automatic
co-driver airbag shutoff or damage the system...