use a tongue weight as close as possible to the maximum tongue weight
do not use a tongue weight that exceeds or falls below the permissible tongue weight
the permissible towing capacity
the permissible rear axle load of the towing vehicle
the permissible gross mass of the towing vehicle
the permissible gross mass of the trailer
the maximum permissible speed of the trailer
the tyre pressure on the rear axle of the towing vehicle is set for a maximum load
the lighting of the connected trailer is operational
vehicles without LED headlamps or MULTIBEAM LED headlamps: the headlamps have been set correctly.
In the event of increased rear axle load, the car/trailer combination may not exceed a maximum speed of 100 km/h for reasons concerning the operating permit. This also applies in countries in which the permissible maximum speed for car/trailer combinations is above 100 km/h.