Hi forum! I have a '81 300D with a power sunroof. The sunroof will not open. When I depress the switch on the console it makes a "whirring, clanking" noise up in the ceiling area...Question: how does one go about checking out the tracks, linkages etc. without destroying the headliner?...Anyone else have this problem? Is there a common fix?...I do hear noise when I push the switch, so I know, at least, it's getting power to it....

thanks!
sean hilton
silver on blue 300d