Exactly the same issue, except i hear a fast clicking (almost a loud buzzing) when the switch is held down, as if it has a ratchet to stop it burning out, is this the case?
But essentially the sunroof wont budge with motor or manual key at all, it starts to turn again about 1/4 of a turn and yet nothing after that, can the rails be seized? If so can I not just 'help' the sunroof motor by pushing it up to free it? Any good places to wedge a WD40 straw to give it a dousing without removing head lining?
Any advice? Tips? Or is it headlining out job? is this difficult on a GTV???? I'll tackle pretty much anything on a car but roof linings appear a dark art!