the power output of the engine, and conse-
quently the vehicle's gradient-climbing capa-
bility, decrease with increasing altitude.
Folding the ball coupling in or out
Folding out the ball coupling
G
WARNING
If the ball coupling is not correctly engaged,
the trailer can detach. There is a risk of an
accident.
Always engage the ball coupling as described.
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.
Before you can tow a trailer with your vehicle,
you must fold out the ball coupling.
X
Make sure that the vehicle is stationary.
X
Open the boot lid.
X
Pull release knob
:
until the ball coupling
unlocks.
The ball coupling folds out from under the rear
bumper.
The indicator lamp on the release knob
flashes. The trailer power socket is integrated
in the ball coupling.
X
Press the ball coupling in the direction of the
arrow until it engages in a vertical position.
The indicator lamp on the release knob goes
off.
The multifunction display shows the
Check
Check
trailer hitch lock
trailer hitch lock
display message until
the ball coupling is engaged.
X
Remove the protective covering from the ball
coupling and store it in a safe place.
Folding in the ball coupling
i
Fold the ball coupling back in if you are not
using the trailer tow hitch.
X
Make sure that the vehicle is stationary and
the trailer cables are disconnected.
X
Place the protective covering on the ball cou-
pling.
X
Pull release knob
:
again until the ball cou-
pling unlocks.
The ball coupling folds down from under the
rear bumper. The indicator lamp on the
release knob flashes.
X
Press the ball coupling until it engages behind
the bumper.
Do not attempt to speed up this process by
applying additional pressure with your foot.
The system could otherwise be mechanically
damaged.
The indicator lamp on the release knob goes
out and the message in the multifunction dis-
play disappears.
Coupling up a trailer
X
Make sure that the transmission is in position
P.
X
Apply the electric parking brake.
228
Towing a trailer
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