See also:

Trailer towing
PARKTRONIC is deactivated for the rear area when you establish an electrical connection between your vehicle and a trailer. Fold in the ball coupling if the trailer tow hitch is not requir ...

Tire size designation, load-bearing capacity and speed rating
Tire width Nominal aspect ratio in % Tire code im diameter Load bearing index Speed rating Tire data is vehicle-specific and may deviate from the data in the example. General: de ...

Installing the ball coupling
WARNING If the vehicle/trailer combination is not secured, the trailer may come loose. As a result, you could cause an accident. Observe the ball coupling manufacturer's installation inst ...