What should you do here?

In this scenario, reducing speed significantly and continuing to drive in your lane is essential due to the damaged road surface. According to German traffic regulations, when encountering issues like potholes or uneven surfaces, it’s crucial to slow down to maintain control of the vehicle and avoid potential accidents. Driving in your lane ensures you do not endanger others or yourself by swerving into oncoming traffic or adjacent areas.

Choosing to drive left past the damaged area is not advisable because it could put you in a situation where you're crossing over into another lane improperly, which may be unsafe. Therefore, the correct combination of actions helps ensure everyone’s safety and compliance with traffic laws.