How can you see that the coupling pin has engaged correctly in the case of an automatic trailer coupling?

You answered correctly. With an automatic trailer coupling, you can tell the coupling pin has engaged correctly either by checking the position of the control pin on the coupling itself or by looking at the control light in the driver’s cabin. These indicators are designed to clearly show whether the trailer is safely connected, helping you avoid driving with a trailer that isn’t properly secured. Methods like checking the release lever or driving forward briefly are not reliable for this purpose. Always look for the official control signal or pin position to confirm a safe connection. This ensures safety and follows the correct procedure according to German traffic regulations.