I had to get quite insistent with my dealer. I also got the "we can't speed with the vehicle in order to replicate the problem, sir". i was advised by my dealer that this issue of wind noise IS a common problem, and most dealers are aware of it. As it was explained to me, during assembly, the glue line for the windshield is layed down by a machine, which begins at the top centre of the windshield, and traverses around the perimeter of the windshield opening, finishing again at the top of the windshield. The starting/ending point of the glue-line (i.e., at the top center of the windshield) is typically where the problem arises and is a result of this being the start/stop point of application. Apparently, the adhesive bead does not overlap itself, as this would create an uneven bead thus creating the same issue. Unfortunately, as I mentioned previously, the fix usually involves a replacement windshield which is probably why BMW is being so difficult is recognizing this malady (wind noise) as a systemic installation issue. If you can't get any satisfaction from your local dealer, maybe shop around with local glass installers and see if they are willing to remove and re-install the existing uint. The existing windshield can be removed if you are very careful (the old two pairs of vise grips and a piece of piano wire approach). Alternately, you might wait until you accidentally catch a rock and then look for your galss insurance to step in.