Window Problems
Problem encountered with an S2 window sticking 2" open.
Even with door card off and the door handle mech out to have a good look, its pretty difficult to gain access to the window.
Issue identified with the screw holding the top of the window guide rail at hinge end of door. This can loosen and sit proud of the guide. This then catches on the top slide (white plasticky material sikoflexed to the side of the window) on the front edge of the window. Prior to removal of door card etc, lower the window, take the window seals off the door (these slide off easily by hand) and inspect window guide for loose fitting screw (if screw is loose, window guide will rattle). A short-handled philips screwdriver to tighten the screw and it's as good as new.
All in all its a 5 minute job with the right diagnosis.