Your tractor is equipped with a K 80 coupling system with manual locking. What must you ensure when coupling a trailer?

When using a K 80 coupling system with manual locking, it is essential to first adjust the height of the trailer coupling to match the tractor's coupling height. This ensures a secure and stable connection without strain. After coupling the trailer, you must lock the retainer to prevent accidental uncoupling during transport, which is crucial for safety. Lubricating the coupling system before each use is not required every time but should be done periodically to maintain smooth operation. Following these steps ensures a safe and proper trailer connection according to German traffic regulations.