The vehicle ahead has prevented you from overtaking for some time now. What is the right course of action?

In the scenario you've described, if you are unable to overtake the vehicle ahead, the correct course of action is to wait until it is safe to do so. This aligns with German traffic laws that prioritize safety and caution on the roads.

Closing the gap can be dangerous as it might encourage aggressive driving and does not ensure a safe overtaking opportunity. Additionally, sounding your horn and flashing your headlights persistently is generally not advisable unless you are in an emergency situation, as it can be considered aggressive behavior and may not resolve the issue of being unable to overtake.

In summary, patience is crucial. Always wait until you have a clear and safe opportunity to pass, respecting the safety of all road users.