Mercedes-Benz GLA 180 Owner's Manual page 218

The multifunction display shows the
trailer hitch lock trailer hitch lock
the ball coupling is engaged.
Remove the protective cap from the ball cou-
X
pling and store it in a safe place.
Make sure that the ball of the ball coupling is
X
clean and that it is either greased or dry
(grease free), depending on the instructions
for the trailer.
Folding in the ball coupling
G
WARNING
If you release the ball coupling or it does not
engage correctly when folding in, it will swing
out. Within pivoting range of the ball coupling,
there is an increased risk of an accident and
injury.
Only release the ball coupling if the pivoting
range is unobstructed. Always make sure that
the ball coupling engages when folding in.
i
Fold the ball coupling in if you are not using
the trailer tow hitch.
Make sure that the vehicle is stationary and
X
the trailer cables are disconnected.
Place the protective cap on the ball coupling.
X
i
The release wheel is located behind the left-
hand side trim panel in the luggage compart-
ment.
To open the cover: turn handle : anti-
X
clockwise, then fold down and remove
cover ;.
Pull out release wheel =.
X
Turn release wheel = anti-clockwise as far as
X
it will go.
The ball coupling disengages and folds out
behind the rear bumper. Indicator lamp ?
flashes.
Press the ball coupling until it engages audibly
X
behind the bumper.
The indicator lamp on the release knob and
the message in the multifunction display go
out.
Check Check
display message until
Coupling up a trailer
Make sure that the transmission is in position
X
j.
Apply the electric parking brake.
X
Position the trailer on a level surface behind
X
the vehicle.
Couple up the trailer.
X
Establish the electrical connection between
X
the vehicle and the trailer.
Check that the trailer lighting system is work-
X
ing.
A connected trailer is only detected when the
electrical connection is established correctly
and when the lighting system is working prop-
erly. The function of other systems, such as
®
ESP or PARKTRONIC also depends on this.
Uncoupling a trailer
G
WARNING
If you uncouple a trailer with an engaged over-
run brake, you could trap your hand between
the vehicle and the trailer drawbar. This poses
a risk of injury.
Do not uncouple a trailer with an engaged
overrun brake.
!
Do not disconnect a trailer with an engaged
overrun brake. Otherwise, your vehicle could
be damaged by the rebounding of the overrun
brake.
!
Remove the installed adapter cable before
folding in the ball coupling. Otherwise, dam-
age may occur to the rear bumper and the
adapter cable.
Make sure that the transmission is in position
X
P.
Apply the electric parking brake.
X
Secure the trailer against rolling away.
X
Remove the trailer cable and decouple the
X
trailer.
Trailer power supply
!
You can connect accessories to the perma-
nent power supply up to a maximum of 240 W.
Towing a trailer
Z
215