Originally Posted by JJsM3
Is this a difficult / expensive retro-fit? I'd also be interested.
Again, you need a new radio (if no iDrive), the activation codes and then coding. If your M3 is an E93 then you will need the antenna ($145 or so, plus install).
-2012 E92 M3 Jerez Black/Rust Brown, M-DCT: September ED
-2008 E90 M3 Melbourne Red/Bamboo, 6MT: Gone
-2007 MK5 GTI United Grey/Grey, DSG: Gone
-2004 E46 M3 Carbon Black/Cinnamon, 6MT: Gone
-2002 E46 330i Orient Blue/Natural Brown, 5MT: Gone