What is the right course of action?

Your answer is correct. According to German traffic rules, when making a turn where a cyclist is going straight ahead, you must give way to the cyclist. Cyclists generally have priority when continuing straight at intersections or junctions, unless there is a traffic sign or signal indicating otherwise.

In the situation shown, the cyclist is going straight, and you are turning right. Therefore, you must allow the cyclist to pass first to avoid any collision. This rule helps protect vulnerable road users like cyclists and ensures safe and predictable traffic flow.

The blue truck must wait because it is turning left, which typically means it must give way to straight-going traffic and the cyclist coming from the right.

Remember: When turning, always give priority to pedestrians and cyclists who are continuing straight, unless traffic signs give you a different instruction.