Step 1: Preparations
—Move the right-hand front seat as far back as possible (→ Front seats), then open the lock and remove the stowage
box.
—Note down the number stamped on the key before using the removable ball coupling neck for the first time. You
will need this number if you have to acquire a replacement key.
—Remove the sealing plug from the mount for the ball coupling neck under the bumper. Stow the sealing plug
securely in the vehicle.
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6
3
—Check to ensure that the mounting, handwheel→ Fig. 1
, shank
and the retaining balls
on the ball
coupling neck are all clean and not damaged → . Clean if necessary.
Step 2: Pre-tensioning the ball coupling neck
The ball coupling neck cannot be fitted properly unless it is pre-tensioned.
2
—Grasp the ball coupling neck underneath the ball coupling→ Fig. 1
with one hand.
into the lock.
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8
—Remove the lock cap→ Fig. 1
from the lock and insert the key
8
—Turn the key → Fig. 1
anticlockwise.
9
A
—Use your other hand to pull out the handwheel→ Fig. 1
in the direction of arrow
and hold it in this position
→
.
9
B
—Turn the handwheel→ Fig. 1
in the direction of arrow
until it engages. The ball coupling neck is now pre-
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13
tensioned. The red marking
on the handwheel must point towards the white marking
on the ball coupling
neck. The handwheel protrudes clearly from the ball coupling neck. The gap between them is approximately 4 mm
10
.
3
6
—Check to see whether all retaining balls→ Fig. 1
can be pressed fully into the ball coupling neck
.
Step 3: Attaching the pre-tensioned ball coupling neck to the vehicle.
Do not touch the handwheel once the ball coupling neck has been pre-tensioned. When engaged, the handwheel will
spring back to its original position and could cause injury →
.
—Guide the pre-tensioned removable ball coupling neck into the mounting pipe from below.
5
—Push the ball coupling neck firmly upwards until it engages. Both centring devices→ Fig. 1
must engage in the
mounting points on the vehicle.
9
—The handwheel → Fig. 1
has now returned to its original position. There is no longer a gap between the
handwheel and the ball coupling neck.
8
—Turn the key → Fig. 1
—The handwheel → Fig. 1
—Fit the lock cap→ Fig. 1
in the handwheel clockwise and remove it.
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7
may now no longer be pulled out.
on the lock and place the key in the stowage box.
—Secure the stowage box under the right-hand front seat.
Step 4: Safety check.
Check if the ball coupling neck is fixed correctly before attaching a trailer.
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