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Requirements:
the ball neck must be extended fully electri‐
R
cally and engaged in the securely locked
position.
Trailers with a 7-pin plug can be connected to
the vehicle with the following adapters:
adapter plug
R
adapter cable
R
The trailer will be correctly detected by the vehi‐
cle only if the following conditions are met:
the trailer is connected correctly
R
the trailer lighting system is in working order
R
The operation of the following systems depends
on the trailer being connected correctly:
Active Lane Keeping Assist
R
®
ESP
R
Parking Assist PARKTRONIC
R
Active Parking Assist
R
Blind Spot Assist or Active Blind Spot Assist
R
Coupling up a trailer
* NOTE Damage to the vehicle battery due
to full discharge
Charging the trailer battery using the power
supply of the trailer can damage the vehicle
battery.
Do not use the vehicle's power supply
#
to charge the trailer battery.
Remove the cover from the ball head and
#
store it in a safe place (
page 114).
→
Position the trailer on a level surface behind
#
the vehicle and couple it up to the vehicle.
Driving and parking 245
Open the socket cap.
#
Insert the plug with lug
1
#
the socket.
Turn the bayonet coupling
#
far as it will go.
Let the cap engage.
#
Secure the cable to the trailer with cable ties
#
(only if you are using an adapter cable).
Make sure that the cable is always slack for
#
ease of movement during cornering.
Push the combination switch upwards/down‐
#
wards and check whether the corresponding
turn signal light on the trailer is flashing.
A display message may appear on the multifunc‐
tion display even if the trailer has been connec‐
ted correctly:
LEDs have been installed in the trailer light‐
R
ing system
the current has fallen below the trailer light‐
R
ing system's minimum current (50 mA)
in groove
3
on
2
clockwise as
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