You are driving at night on an unlit road. There is a motor vehicle travelling a short distance in front of you. Which lights must you have on?

When driving at night on an unlit road with another vehicle ahead, you must use dipped headlights (low beam). This is because full beam (high beam) would blind the driver in front, reducing their visibility and safety. Side lights alone are not sufficient for visibility at night. Using dipped headlights ensures you can see the road well while not dazzling other drivers, which is a key rule in German traffic regulations for safe night driving.