What do you have to be aware of in this traffic situation?

Your answer is correct because the solid lane marking means you are not allowed to cross it, even to overtake. According to German traffic rules, a continuous (solid) line on your side of the road indicates that crossing it is prohibited for safety reasons, typically because of limited visibility or increased risk of a collision. Even if oncoming traffic seems to allow it, you must not cross the solid line to overtake. Only if the line is broken (dashed) may you cross it to pass another vehicle when safe. This ensures safe driving on roads with potential hazards like curves, hills, or limited sight distance.