hi there its a 2005 range rover sports supercharged I tried to open it and the back of it went down then stopped will not go back up so I have had tape it so no water gets in ive looked in the book and it says it can be opened up manually
It's not going to be an electrical issue as it is attempting to open. On the Classic, P38 and L322 sunroofs there are "lift blocks" that raise the glass panel into it's closed position. From their these same blocks move forward further to raise the glass panel. This same design has been used on every sliding panel roof I have ever worked on so I would imagine the basic idea still applies to the L320. You'll need to inspect, as best you can, for anything out of place. Are you able to manually press up on the glass panel to raise it? Is it low on both rear corners evenly or is one side loose?
Another option is to break off the trim down each side of the glass panel, left and right, on the interior. THis will expoce hte screws holding the panel to the sunroof mechanism. You can then lift the glass panel out from above and gain access to the runners, lift block and tracks. DOn;t worry, the trim strips are only a few bucks from the dealer.
How To Reset Sunroof:
Don't start the engine, just the ignition by pressing the engine start/stop button without
stepping on the brake.
Then, press the sunroof button forward for 20 seconds, you will hear and see the roof open & close by itself.
Once it’s done, release the button and you’re done.