Two vehicles approach one another at an intersection. Both vehicles want to turn left. In what exceptional case do they have to turn one after the other?

Your answer is correct because in German traffic rules, when two vehicles face each other at an intersection and both want to turn left, they usually turn simultaneously by passing each other on the right. However, in exceptional cases, they must turn one after the other. These exceptions occur if the road traffic situation or the layout of the intersection requires it—such as when the intersection design or traffic signs indicate that simultaneous turning could cause confusion or danger. This helps maintain safety and smooth traffic flow. The third option is incorrect because crossing at an equal priority intersection does not change the general rule for left turns facing each other.