you want to get yourself an A4 mirror
built in auto dimming and compass 
do u have to modify anything to put this on?
i want one by the weekend 
not 100% sure i've read a few site in the past saying they have got them working but that was some time ago, someone will have to investigate, another think i've seen is people fitting the A3 auto dimming side mirrors, apparently the sharan had this too, which is probably an easier fit
