What do you have to do in this traffic situation?

You answered correctly. In Germany, when you see a stop sign, you must always stop completely at the stop line if there is one. If there is no marked stop line, you are required to stop at the line of sight—meaning you must stop at the point where you can see and assess cross traffic before proceeding. The rule applies regardless of whether cross traffic is visible or not; a full stop is always mandatory at a stop sign. You chose the right answer by selecting to stop at the line of sight and give way. Remember this rule for any stop sign scenario, especially when a stop line is missing.