Jetta L4-1781cc 1.8L SOHC (RV, PF) (1989)
3. Remove the left and right rail cover screws (arrows) and remove the covers. Remove the front guides.
4. Pull the cable assembly (A) and the rear guides from the guide rails (B) in direction of arrow.
5. Installation of the rear guides with cables is the reverse of removal. Reinstall the front guides and rail covers, then adjust the sunroof, See:
Adjustments