Z is correct on this matter.....
And, this issue has been previous discussed (& remedied) over the years, by what Z himself has suggested.
It has to do with the wire loom(s) that lie within the front of the sunroof tray, not having enough "support" so to speak, from the factory.
Fudge a piece of w/e to help support that factory loom, and you should definitively notice significantly less noise.
Good luck!
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