I had a Golf Mk6 GT which had the auto dim interior mirror & rain sensor facility. I now have a 2012 Jetta SE which doesn't have them. Not bothered about the rain sensor but really miss the dimming mirror. Has anyone done a retrofit (I believe Gentex is the place to get a mirror) & if so what are the problems if any in wiring in to the overhead loom. I assume a permanent live feed is needed. Is there one up there or would I have to route cable down the A pillar to fusebox?
Any help will be appreciated.