Here's the scoop, did this two years ago, same problem except that mine was stuck shut and nearly ruined the headliner on the sunroof gettting it out.

What has happened is that either you have a loose cable (and it is now sidways, with one bolt out, and stuck) or one of the panel retainer screws has come loose, jamming things up.

Dollar to a doughnut, you also have a broken lift angle bracket, yours are the new ones, I think, but they break too, if they aren't lubricated enough with the correct stuff.

First, I've described all this in detail in older posts, do a search on "sunroof", that way I won't have to type it all in again.....

The headliner on the sunroof is clipped on by four plastic clips an inch or so back from the front edge. Use a (clean) putty knife or similar to unclip them, and you will be able to slide the headliner forward and up out of the roof. It will be tight, and be VERY careful not to bend the side rails, or it all pops apart, big PITA. You must pull it off the cable on the rear portion (the part that is behind the actual panel) -- pull on that, not the front as soon as you can.

Once you have the headliner out, you will able to see what is going on. Most likely you have either something stuck in the side rails, the lift angles are both broken, or only one side is busted and the translation bridge is cocked and stuck.

If you can clear the junk out and get it to slide, you can just leave it closed until you have time to fix it. You may need to tape it shut to keep noise out, but it won't leak anywhere near as much as halfway open...

To repair, you will have to remove th roof panel. I'll give any help you still need after you find the previous posts.

Peter

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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!