At a red light in a built-up area, another driver apparently wants to provoke you into a street race. What should you do?

You answered correctly. In situations where another driver tries to provoke you into a street race at a red light, the correct and legal behavior is to completely ignore them. Participating in or responding to provocation, even if you believe you will obey the speed limit, is not permitted and may lead to dangerous situations or illegal street racing, which is strictly prohibited in Germany. Staying calm and ignoring such behavior keeps you and others safe and complies with traffic laws.