Which vehicles must be equipped with amber reflectors on their sides?

You answered correctly. According to German traffic regulations, vehicles that must have amber reflectors on their sides include tractors longer than 6 meters including any mounted implements, as well as trailers and attached working equipment. These reflectors increase the visibility of long or towed vehicles from the side, especially at night or in poor visibility conditions, helping to prevent accidents. However, not all multiple-track motor vehicles require amber side reflectors—only the specified long vehicles and trailers. Understanding this helps you identify which vehicles need additional side marking for safety.