What is the right course of action?

In this situation, the traffic sign indicates that you must yield to vehicles coming from other directions.

By choosing to allow the motorcycle to pass through and taking priority before the bus, you are correctly recognizing that motorcycles generally do not have to yield to vehicles in certain situations, and you are also aware that public transport buses may have priority under specific conditions.

In Germany, the rules regarding priority often distinguish between different types of vehicles, and public transportation typically has reserved rights to proceed when it is safe.

It's crucial to always assess the specific context at intersections and yield appropriately, ensuring all traffic flows safely and efficiently. Understanding when to give way helps prevent accidents and maintains order on the roads.