You want to park your single-axle trailer (overrun brakes, 1000 kg permissible total mass) on a slope. What must you do?

When parking a trailer with overrun brakes and a permissible total mass of 1000 kg on a slope, it is essential to ensure that it does not roll away. The parking brake alone may not hold the trailer securely because overrun brakes act through the towing vehicle, and without it attached or under certain conditions may not be fully effective. Therefore, pulling the parking brake helps, but to guarantee that the trailer remains safely stationary, wheel chocks must also be placed under the wheels to physically block movement. Engaging a reverse lock is not required or standard for this purpose. Combining the parking brake and wheel chocks is the correct safety procedure according to German traffic rules to prevent accidents caused by trailer roll-away on slopes.