What is the right course of action in this situation?

In this situation, the best and only correct action is to stay behind the tram. According to German traffic rules, you are generally not allowed to pass a tram on the right within built-up areas if there is no dedicated lane for that maneuver or if it is not explicitly permitted. Passing on the left might also not be allowed if it endangers other traffic, especially if there is not enough space or if there are obstacles, pedestrians, or oncoming vehicles. The safest and legally correct approach is to wait patiently behind the tram unless signs or road markings indicate otherwise. This prevents danger to passengers who may be entering or exiting the tram and helps maintain order in busy city areas. By remaining behind, you comply with both safety and legal requirements.