W126 Sunroof Electrical help
 

My '83 300SD sunroof is feeling uncooperative. It makes a single tiny click when the switch is depressed in either direction, and will not move. However, it opens and closes just fine with 12V manualy applied to the connector pins nearest the motor. I have cleaned the sunroof dash switch contacts well. Does anyone have a schematic for this circuit? Where is the relay located? I've seen some reference to it being in the main fuse/relay block under the hood, but my relay chart is missing from the block.

Bump. Any thoughts?

this may sound odd but check the screw in the bottom of the fusebox. I had the exact same thing happen on my old one, damn near drove me crazy until i happened to come accross the problem in the midst of running new wiring. Simply tightened down the screw and viola. Good luck