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Unlock lock
6
in handwheel
#
Red mark
3
on the handwheel must be
aligned with green area
(fitting position).
If red mark
3
is not aligned with green area
#
2, unlock lock
6
key.
Pull handwheel
1
#
3
into green area
handwheel
1
engages.
Slide ball neck
4
#
until it audibly engages.
The ball neck will lock automatically. Green
mark
3
on handwheel
green area
2
on ball neck 4.
Only if the green mark on the handwheel is
aligned with the green area on the ball neck is
the ball neck securely engaged.
Lock lock
6
in handwheel
#
Remove the key and place cap
#
The ball neck is securely installed only if the
ball neck can be locked and the key removed.
Store the trailer hitch key in a safe place, e.g.
#
in the vehicle document wallet.
If you cannot remove the key, the ball neck may
be dirty.
Remove the ball neck (
#
clean it (
page 238).
/
If you still cannot lock the ball neck after cleaning
it, the trailer hitch is damaged.
Remove the ball neck.
#
Safe trailer operation is not guaranteed. The
ball neck must no longer be used for trailer
operation.
Have the trailer hitch checked at a qualified
#
specialist workshop.
1
with the key.
2
on ball neck
4
in handwheel
1
with the
outwards. Turn red mark
2
of ball neck
4
until
vertically into the holder
1
is aligned with
1
with the key.
5
on lock 6.
page 183) and
/
Removing the ball neck
Requirements:
The trailer hitch key is available.
R
Remove cap
5
from lock
#
1.
Unlock lock
6
in handwheel
#
Hold ball neck
4
in place.
#
Pull handwheel
1
#
3
on handwheel
1
ball neck
4
until handwheel
Pay attention to the pictogram on handwheel
1.
Pull ball neck
4
out downwards.
#
If the ball neck is dirty, clean it
#
(
page 238).
/
%
Depending on the vehicle equipment, the
holder for the ball neck on the vehicle can be
protected with a cover in the bumper.
Store the ball neck with the key inserted in
#
the stowage space on the right-hand side in
the rear and remove the cover for the ball
neck holder.
Insert the cover in the lower section of the
#
bumper and tighten the two quick-release fas‐
teners for the cover (
Coupling/uncoupling a trailer
Requirements:
The ball neck must be engaged in a securely
R
locked position.
Trailers with 7-pin plugs can be connected to the
vehicle using the following adapters:
Adapter plug
R
Adapter cable
R
Driving and parking 183
6
in handwheel
1
with the key.
outwards. Turn red mark
into green area
2
of
1
engages.
page 182).
/
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