What must you be aware of here?

Your answer is fully correct because all three points are important to consider in this situation.

In German traffic rules, when driving through residential areas like this one, you must be aware of several risks:

1. Vehicles speeding: The speedometer shows around 30 km/h, but other vehicles might exceed the speed limit, creating unexpected dangers.

2. Junctions not noticed: Intersections may be hidden or overlooked, especially from the perspective shown in the rearview mirrors, so you must watch carefully for other vehicles entering or crossing.

3. Children may run onto the road: Residential areas often have children playing or walking near the street. They might suddenly run onto the road, so you need to be prepared to slow down or stop.

Recognizing all these hazards helps maintain safety and avoid accidents in environments with higher pedestrian activity and multiple junctions.