The adapter was to short and therefore has no contact made in my cigarette lighter. It has therefore not working. But simply pull out did not work, because the things firmly stuck in it and it finished plan. You could tackle nowhere to pull out the part again. Very stupid constructed. So I had to part with a pair of pliers to pull out. It is then of course broke down.
Absolute Fehlkonstruktion!
I never imagined then ordered another adapter that works properly.