sounds like the tray is un hooked or the clutch is loose, the clutch adjustment is located in the trunk at the right rear quarter panel, remove the panel, tighten the nut 60 degrees and test sunroof, if you need detailed procedure e mail me and I will fax or email a pdf file from the manual for my 300E

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Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles