How is it possible to prevent oncoming traffic being dazzled by the dipped headlights?

Your answer is fully correct. In German traffic rules, preventing dazzling of oncoming traffic involves several measures. First, adjusting the headlight range according to the vehicle's load ensures the beams are not aimed too high, which could blind other drivers. Second, using only the approved and permissible light bulbs guarantees that the brightness and beam pattern comply with legal standards, avoiding excessive glare. Third, after any repair, checking and correctly setting the headlights is essential to maintain proper alignment and prevent dazzling. Together, these measures help ensure safe and considerate use of vehicle lighting on the road.