I am almost 100% I have found the source of the rear wind intrusion that some of us are hearing. From day one, I have had a wind hissing noise from the rear door windows. After taking it to the dealer and them saying it was "normal", I have been on a mission to find the source of the noise. Well it is coming from a location that I never thought it would come from. After trial and error, I found it is coming in around that shinny black triangle part in the rear door. There is a gap between the rubber and that plastic shinny triangle part. I used shinny black pinstripe that I got from an auto parts store to cover the gap. I test drove several times at speeds above 65mph and did not hear the noise. Unless you were looking close, you'd never know the pinstripe was there. I hope this will help others correct this at least until VW has a TSB to correct it.