Problems with trailer towing
Problem
Possible causes/consequences and
M
Solutions
The released ball cou-
pling cannot be
engaged.
X
Visit a qualified specialist workshop.
The ball coupling does
not unlock, even
though:
R
the vehicle is station-
ary.
R
no trailer cable is
connected.
R
the release knob to
unlock the ball cou-
pling has been pulled
for more than a sec-
ond.
The on-board voltage is insufficient.
X
Start the engine.
If the ball coupling still does not unlock:
X
Visit a qualified specialist workshop.
232
Towing a trailer
Dr
iving
and
parki
ng