The corners of the aluminum trim are a little "loose", i.e., trim not fully seated in the rubber seals groove. I read in our site tech manual section this could cause a whistling effect and I was unable to find any hints here for solving this problem - I've tried silicone and clamping but just can not get those four corners to seat nicely on the inside edges. Hoping someone could help me out. Just FYI, I am dealing with a new windshield, new rubber seal and old aluminum trim piece (as it came off this car) which I have not damaged in terms of correct shape. All are MB parts, and this is a '68 280SL.