E420 97 sunroof(moonroof) problam

Hello The sun roof on my 97 E420 got stock on the half popped up position(the driver's side was a little lower) I didnt have a prolam closing it but when i tried to slide it back(opening it) it just got stock and made a very loud cranking/popping kind of noise.,and didnt move .It looks like the driver's side front corner is stuck somehow.
Would anyone have any ideas if it is something i should attempt to fix or i should look for more profeshional help.I took the sunroof apart on my old 500SEC awhile back and it worked like a charm but with this roof everything is hidded (moonroof)
Thanx for any respons