The last "Factory" fitted Sunroof was the FD LTD. I think, after that any sunroof was supplied and fitted by either Golde or Hollandia.
It won't have the "flip up" ventillation feature of the newer models and as far as I know the only problem with these was as you say - leaking. Most of this is due to either the seals drying out or mis-alignment of the actual unit. Both can be addressed when you get it installed.
My bro-in-law's XF Ghia has one of these sunroofs fitted and I hate to say it but if his car was ever smashed - I'd love to transfer that into my ESP when I rebuild it. I had the chance to get one from a wreckers but before I got there they had stuck another car on the roof and well you can guess what condition it was in.
476 EF XR6 Wagons - 198 were Manual
Member Tickford / FPV Club - SA