The real issue is that all these roof start to rattle eventually. This never was a problem with the 'old' style sunroof which only retracted and did not 'tilt'. I had my 996 in several times to have the rattle fixed - once the dealer returned the car with two large dents in the roof (from the inside out) after an attempt to stop the rattle.

I do not use the tilt feature anymore as I now feel (incorrectly, I am certain) that the tilting causes the mechanism to come loose and start to rattle. I am starting to hear a faint rattle in my 997!