I have a pesky, elusive rattle when my sunroof is open (in any position). It's on the driver side only at the front corner of the mechanism where the rollers and slides are. Every road bump puts an annoying clicky-clack right in my ear. I thought the plastic guard was loose, but the problem is deeper. Attempts to reproduce the rattle when the car is stopped have been less than productive.

Has anyone had and solved this issue? Thanks for any advice.

08 MCSC