Problems with trailer towing
Problem
Possible causes/consequences and
M
M
Solutions
The displaced ball cou-
pling does not reach the
securely locked position.
R
The indicator lamp in the button flashes.
R
The
Check trailer hitch lock
Check trailer hitch lock
message appears in the multi-
function display.
X
Initiate a new swivelling procedure.
If the ball coupling does not reach the safely engaged position as a
result:
X
Start the engine
or
X
Pull and hold the button during the whole swivelling procedure.
If the unlocked ball coupling does not reach the safely engaged posi-
tion even after several attempts:
X
Make sure that there is sufficient ground clearance before continu-
ing the journey.
X
Consult a qualified specialist workshop.
As long as the
Check trailer hitch lock
Check trailer hitch lock
display message is
shown in the multifunction display, no trailer should be attached.
Unlocking using the
button in the tailgate:
The ball coupling does
not swivel, even though:
R
the vehicle is station-
ary
R
no trailer cable is con-
nected
R
the button was briefly
pulled
The on-board voltage is too low.
X
Start the engine.
If the ball coupling still does not unlock:
X
Consult a qualified specialist workshop.
Towing a trailer
279
Driving
and
parking
Z
