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