What is the right course of action now?

Your answer is correct because both increasing your distance to the car ahead and continuing to drive with increased care are essential safety measures in this situation. According to German traffic rules, when approaching a slower vehicle, you must maintain a safe following distance to have enough reaction time in case the vehicle slows down or stops suddenly. This helps prevent rear-end collisions. Additionally, driving with increased care means staying alert, adjusting speed smoothly, and being prepared for any unexpected changes.

On the other hand, overtaking requires clear visibility, enough space, and must be done only when safe and permitted. Since the correct answer does not include overtaking here, it indicates that overtaking would not be safe or appropriate in this scenario. Therefore, focusing on increasing distance and driving carefully follows the German rule to prioritize safety and adjust to traffic conditions properly.