You take over a semitrailer which you have not used before. What must you remember before attaching the semitrailer?

Your selected answers are correct because both the condition of the coupling pin and the space between the driver's cabin and the semitrailer are critical for safe attachment and operation of the semitrailer. Checking the coupling pin for wear or damage is crucial, as a faulty pin can lead to a dangerous separation of the vehicle components during transit. Ensuring adequate space between the driver's cabin and the semitrailer is also essential to prevent any interference while driving, which could result in loss of control.

Regarding the third option about tyre size, while it is important for the tyres of the semitrailer and the truck tractor to be compatible for optimal performance, it is not specifically a prerequisite for attaching the semitrailer. In the context of initial attachment, the first two checks are the primary concerns that ensure safety and compliance with German traffic regulations. Always remember that thorough inspections before driving or towing are vital to ensure road safety.