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:
1 "ZR" stated in the tire code.
2 Or "M+Si" for winter tires.
Specifying the speed rating as the "ZR" index
in tire code is optional for
tires up to
186 mph (300 km/h).
If your tire code includes
"ZR" and there
is no speed rating , find out
what the maximum
speed is from the tire manufacturer...
Removing the emergency key
Press release knob
. Emergency key 2 is pushed out slightly.
Pull out emergency key
until it engages in the intermediate position.
Press release knob
again and fully remove emergency key
.
Inserting the emergency key
Press release knob ...