You want to couple on a multiple-axle trailer. What must you ensure?

Your selected combination is correct because both points are essential for safely coupling a trailer.

1. Securing the trailer against rolling away is crucial to prevent accidents when the trailer is not attached to the vehicle. German traffic regulations emphasize the importance of securing trailers to ensure safety during the coupling process and while parked.

2. Ensuring that no one is allowed between the motor vehicle and the trailer is vital for safety. This rule helps prevent injuries that could occur during the coupling process, as a person could get caught or injured by the moving parts of the vehicles.

The third option about connecting the brake lines before docking is important too, but it is not necessary to ensure safety during the coupling itself, as this action should happen only after the trailer is properly secured. Understanding these points helps enhance road safety and compliance with German traffic laws.