You want to turn out of a road with a sunken kerbstone into another road. A car is coming from the left. What applies here?

You selected the correct answer. In Germany, when turning from a road with a sunken kerbstone into another road, you must always wait and give priority to all other vehicles on the road you are entering, no matter from which direction they come. The sunken kerbstone indicates that you are entering a road from a driveway, property exit, or a minor path, and drivers already on the main road have the right of way. The "right before left" rule does not apply in this case; the sunken kerbstone overrides it. This helps avoid confusion and ensures that traffic on the main road is not interrupted by vehicles coming from minor accesses. Remember this rule whenever you see a sunken kerbstone at the edge where you are joining another road.