Over the last few weeks my sunroof has developed the annoying habit of rattling when shut, along with an occasional wind whistle for good measure. I've inspected the seals and greased the moving mechanisms to no avail. While I havn't checked my FSM yet to see what it says, is there anything common I may be unaware of, i.e. a fastener that works itself loose, adjustment screw, something? There doesn't seem to be any play in it when angled "up", or when half open, and just enough play for it to rattle when closed. Any ideas?