I installed a panoramic Rally Wink mirror in my XV, very happy with the results:
I had one of these in my '84 Scirocco and really liked being able to see all around, I took a panoramic POV shot to show the range of view in the XV (came out a little warped, but you get the idea):
I had to remove the headliner to bolt it into the shell, and the brackets are coming down through two slits I cut into the headliner for this. All in all, a much cleaner install than I had in the Scirocco.
One thing to keep in mind is that these warp under extreme heat and will start to sag into a smile. I'm preventing that this time around with two L-shaped aluminum posts that I cut to the length of the mirror and fastened with two hitch pins going through the posts and the mirror itself. Plasti Dipped the whole thing black when finished.
I'm not sure what's going to happen with the original mirror mount still on the windshield, but I'd like to throw a radar detector or camera up there. Does anyone know if there's some sort of universal mount that will clip onto this to hold those accessories?