What must you do in this situation when you are dazzled?

You answered correctly, and here's why these measures are important according to German traffic rules:

When dazzled by bright headlights from oncoming traffic, you must reduce your speed if necessary to maintain control and safety. Driving too fast when you can't see properly increases the risk of accidents.

Looking to the right-hand edge of the road helps to avoid staring directly into the bright light, which can worsen temporary blindness or glare. By focusing on the edge, you can better maintain your lane position despite the reduced visibility.

Accelerating to get out of the light beam is not advised because it can make handling difficult and lead you into danger.

In summary, slowing down and focusing on the road edge help you stay safe while dazzled by oncoming beams in Germany. This approach allows you to react calmly and keep control until the glare passes.