What is the right course of action in this situation?

Your answer is correct because in this situation, maintaining your speed and continuing to drive as before is the appropriate action under German traffic rules. When driving on a rural road with a posted speed limit and encountering traffic ahead, it is important to keep a steady speed unless there is a clear reason to slow down or accelerate for safety.

In this case, accelerating to create more distance or braking briefly are not necessary if the traffic situation is stable and there is no immediate danger. Sudden changes in speed could confuse other drivers or cause unsafe situations. By maintaining your speed, you demonstrate smooth and predictable driving, which contributes to overall traffic safety.

This principle is especially relevant on two-lane roads without heavy traffic, where consistent speed helps maintain safe distances and allows other drivers to anticipate your actions better. So, the key takeaway is to adjust your speed only when needed for safety or legal reasons, not preemptively.