Mercedes-Benz GLC : Trailer hitch / Towing capacity
The tongue weight is not included in the towing
capacity.
Missing values were not available at the time of
going to press.
Towing capacity, braked (at a minimum startoff
gradeability of 12%)

Towing capacity, unbraked

Modifications to the engine cooling system may
be necessary, depending on the vehicle model.
The retrofitting of a trailer hitch is only permissible
if a towing capacity is specified in your vehicle
documents...
NOTE Damage caused by the trailer
coming loose
If the tongue weight used is too low, the
trailer may come loose.
The tongue weight must
not be below
110...
Other information:
W..
The system may be impaired or may not function
in the following situations, for example:
In snow, rain, fog, heavy spray, if there is
glare, in direct sunlight or in greatly varying
ambient light.
If there is swirling dust, e.g. when driving offroad
or on sandy surfaces...