What must you be aware of here?

Your answer is fully correct because all three points are important to be aware of in this situation:

1. Your vehicle might not be seen in time by others because of the bright headlights coming from the oncoming traffic, which can create glare and reduce visibility.

2. You may detect oncoming vehicles too late due to poor visibility conditions, such as the glare of headlights and the dark environment. This means you have less time to react safely.

3. The traffic lights are difficult to distinguish from the colored advertising signs and neon lights in the background, which can cause confusion about whether they apply or what their signal is.

In German traffic rules, it is vital to recognize these visibility challenges and adjust your driving accordingly—reduce speed, be extra cautious, and prepare to stop if necessary to avoid accidents. This awareness helps you react timely in complex urban night driving situations.