Hi rum4mo - I did what you suggest, and found where one of the screws belonged (underneath the front spoiler area), and put it back. I also found another screw on the floor that I had missed, which turned out to be one I had removed unnecessarily, which also belonged in that same general area, but wasn't actually holding the wheelarch liner on, but another piece of trim under the front end of the car. I put that back too. So I'm still down by one. I think the last one belongs in the rear face of the wheel arch, holding it against the subframe, but the corresponding hole in the subframe doesn't have a spire nut in it, so the screw won't hold. I was under the impression that this problem already existed before I started work, but maybe it was my doing, after all. I can't find the spire nut on the floor and I don't have another one. The other side of the car is slightly different in its placement of screws, apparently by design. The other side also has one screw missing, and must have been that way for at least as long as I have had the car (nearly two years). I suppose I could put my "spare" screw in that hole. Certainly VW Group will not have fitted extra screws "just for a laugh", but I have to assume they have followed sound engineering principles and built some redundancy into the design. I propose to leave it as-is.