Mercedes-Benz GLC 200 4MATIC Owner's Manual page 316

Vehicles with level control system: ensure the
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vehicle is at the normal level (
Use the normal level in trailer operation. High-
level driving is not permitted in trailer opera-
tion on public roads.
A trailer is selected in the Vehicle
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( page 315).
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Trailers with a 7-pin plug can be connected to the
vehicle with the following adapters:
Adapter plug
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Adapter cable
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The trailer will be correctly detected by the vehi-
cle only if the following conditions are met:
The trailer is connected correctly.
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The trailer lighting system is in working order.
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The functions of the following systems will be
affected by a correctly connected trailer:
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ESP trailer stabilisation
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Trailer Manoeuvering Assist
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Active Lane Keeping Assist
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Parking Assist PARKTRONIC
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Active Parking Assist
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page 284).
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Blind Spot Assist or Active Blind Spot Assist
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Drive Away Assist
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Cross traffic warning
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Manoeuvring brake function
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menu
Reversing camera
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360° camera
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AIRMATIC
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Coupling up a trailer
* NOTE Damage to the starter battery due
to full discharge
Charging the trailer battery using the power
supply of the trailer can damage the starter
battery.
Do not use the vehicle's power supply to
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charge the trailer battery.
Remove the cover cap from the ball head and
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store it in a safe place.
Position the trailer on a level surface behind
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the vehicle and couple it up to the vehicle.
Driving and parking 313
Open the socket cap.
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Insert the plug with lug 1 into groove
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the socket.
Turn bayonet coupling 2 to the right as far as
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it will go.
Let the cap engage.
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Secure the cable to the trailer with cable ties
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(only if you are using an adapter cable).
Make sure that the cable is always slack for
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ease of movement during cornering.
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