Problem
Possible causes/consequences and
M
M
Solutions
Unlocking using the
button in the driver's
door (all vehicles
except PLUG-IN
HYBRID):
The ball coupling does
not swivel, even though:
R
the vehicle is station-
ary
R
no trailer cable is con-
nected
The on-board voltage is too low.
X
Engage park position P.
X
Switch on the power supply.
or
X
Start the engine.
If the ball coupling still does not unlock:
X
Consult a qualified specialist workshop.
The ball coupling does
not swivel. The indicator
lamp in the button is
flashing permanently.
The
Check trailer
Check trailer
hitch lock
hitch lock
message
appears in the multifunc-
tion display.
There is a malfunction in the release electronics.
X
When the ball coupling is retracted: pull and hold the button in
the tailgate until the ball coupling engages into a securely engaged
and locked in a vertical position and then engages again under the
bumper.
X
When the ball coupling is extended: pull and hold the button in
the tailgate until the ball coupling engages underneath the bumper.
If the ball coupling still does not unlock:
X
Consult a qualified specialist workshop.
280
Towing a trailer
Driving
and
parking
