You have stopped in a parking strip and now want to exit your vehicle. What must you do in this situation?

Your answer is completely correct. According to German traffic rules, when exiting your vehicle after stopping in a parking strip, you must check carefully to avoid endangering cyclists or other road users.

First, you should look into your left-hand exterior rear-view mirror to spot any approaching traffic, especially cyclists, coming from behind. Then, glancing over your left shoulder is necessary to check the blind spot that mirrors may not cover. This ensures you do not open the door into the path of a cyclist or vehicle that you might have missed in the mirror. Merely looking through a slightly opened door is not sufficient because your view would be too limited to spot approaching road users in time.

Following these steps helps prevent "dooring" accidents, which are a common hazard for cyclists in urban areas. In summary, always use both the mirror and the shoulder check before opening your door to maximize safety.