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