You have left your registered caravan trailer for six months during the winter on a campground. What applies as far as the official inspection (Hauptuntersuchung) is concerned?

Your answer is correct. Even if a registered caravan trailer is stationary on a campground for several months, the required official inspection (Hauptuntersuchung) must still be done on time. The date indicated on the inspection sticker does not change or get extended due to the time the caravan was not in use. German law requires you to observe the original inspection date regardless of how long the vehicle was parked. This ensures that all registered vehicles meet safety standards at all times. So, always check the inspection sticker date and arrange the inspection before it expires, even if your caravan hasn’t been moving.