Cadillac SRX - dreadful Ultraview glass roof

Hello ev'rybody,

I live in Germany and my Cadillac SRX (build 2005) drives me nuts. I have
the model with the huge Ultraview Sunroof.
The dealer has just exchanged this glass thing for the third time (!)
because of those dreadful wind noises I get when driving at speeds higher
than 80 miles an hour. To no avail. We are desperately looking for a
practical solution.
It seems that a kind of uplift effect (like on the wing of a plane) pulls
the glass roof upwards at higher speeds and so to come off the rubberfoam
seals, thus creating the wind noise. The machanic says the glass roof may be
bent and there are no adjustable screws or alike to make it press more
firmly down onto the seals.

Does anybody know how to fix this?

Andreas