I don't think that there is a different fuse for each sunroof function on those. Failure to pop up, while still being able to slide is usually broken arms on the mechanism, however if pulling the fuse temporarily re-activates the sunroof's pop up function, then the mechanism is probably sound.
It is odd that your central locking and speakers go haywire at the same time as the sunroof (Do the door locks actually lock / unlock when you have the problem?). The sunroof motor has a relay and gear set with a microswitch on it to give you the opening functions and a misaligned gear / microswitch sent our 124's sunroof into clanking motor mode with the occasional self opening / closing / dancing about. The whole 'comfort' system, central locking and total closure system is, I think, controlled by an ECU, really a bundle of relays, located under the rear seat squab. I suppose that you could have a loose wire somewhere as well, but the motor gear alignment and the ECU would be my first port of call.