can anyone tell me what type of fixing goes on here? Should it be a nut with a washer or is there some kind of clip or something? I can't find a nut that fits and there is hardly any thread sticking out to get a nut on if i did have one that fits.
It's an N90418401 called a press stud, like this https://www.ebay.co.uk/itm/Genuine-VW-Press-Stud-N-90418401-/332256354533 Just a clip that grips on to the threaded stud, to hold that plastic shield in place.