My fuel cap cover is loose because a plastic part is broken but I don't know how to remove it. I am afraid to loose the cover while driving. I suppose I have to remove part #4 from the car body but I do not see the way.
As your plastic clip is already broken and they don't cost too much from BMW , you could just break the flap clear of the car .
The proper way to remove the fuel filler flap without breaking the clip is to push a small , flat bladed , screw driver through the gap in the clips to release a small black plastic tab and then slide the flap/prongs towards the rear of the car to release .
Thanks Ginger, I live a couple kilometers away from the parts BMW central store in Spain so deliveries are quick when they have the part in stock. When not, they take some 10 days to arrive from Germany.