Hello municipality, big problem. On the passenger side, where the window closes into the roof, it pinches so loud and annoying when driving, that the neck hairs stand up and I no longer have a peek on the car, the topic “joy at driving”. The problem can be solved, if I open the window one millimeter, but then it whistles at speeds from 70 km/h and if I forget in the washing system, water runs in. After my Z4 now the 5th time because of the roof at BMW w ar and the annoying knarzen can not be fixed, I got really angry and now next week an extra BMW technician should come by with them and look at it. My question: Do I have to do this stuff to myself? Overall the car was therefore now 5 x 2-3 days away, each time it was promised that I will get it back without knarzen and then it always says, we have done everything and it is gone. 10 min. Drive and it is back. Does anyone have experiences with such cases? What kan n man do? Write to BMW? Now I would be happy if the problem can be solved by the technician, but for all the inconvenience I would like to have a compensation by now, what can one demand there or what was done in possibly comparable cases? Best regards!