Just had my fabric roof replaces for the same thing - small nick (less than 1mm) but they changed it anyways under warranty. The issue is not the roof, but the plastic panel covers - they are badly made, with sharp ridges that rub against the roof more specifically against the seam. When the...
SO I had the problem on mine and the dealer did a fix initially which didn't work. I just had the car back in and they replaced the regulator and now its fine.
An alternate method I found to get the window up COMPLETELY (because it is a tight fit) is to lock in the roof, unlock it and then...