What must you remember after you have coupled up a trailer to an automatic trailer coupling?

You answered correctly. After coupling a trailer to an automatic trailer coupling, it is essential to check that the coupling pin is fully engaged, as this ensures the trailer is properly attached and won’t disconnect while driving. Additionally, you must check the position of the control pin, which serves as an indicator that the coupling is securely locked. Both steps are required for a safe and correct trailer connection according to German traffic regulations. This prevents dangerous situations on the road caused by improperly attached trailers. Remember to always verify both details every time you couple a trailer.