The ball neck is extended and engaged in a securely locked position
Adapter plug
Adapter cable
The trailer is connected correctly
The trailer lighting system is in working order
Active Lane Keeping Assist
ESP® trailer stabilisation
Parking Assist PARKTRONIC
Active Parking Assist
Blind Spot Assist or Active Blind Spot Assist
Drive Away Assist
Cross Traffic Alert
Reversing camera
360° camera
Charging the trailer battery using the power supply of the trailer can damage the vehicle battery.
LEDs have been installed in the trailer lighting system
The current has fallen below the trailer lighting system's minimum current (50 mA)
Accessories can be connected to the permanent power supply up to 180 W and to the power supply that is switched on via the ignition lock.
When uncoupling a trailer with an engaged inertia-activated brake, your hand may become trapped between the vehicle and the trailer drawbar.
Uncoupling in a state of overrun can damage the vehicle.