i emailed AV Electronic about their plug and play systems, here was their response...
Hi,
We will be releasing the new version Navigation Video Switcher for the new 3 series BMW. With our system, you’ll not loose any factory functions and you don’t need to drill and install any switch inside your car and it’s Valet–parked safe. Please check or call back in 3 weeks.
Thanks,
Sales Team
AV Electronic, Inc.
770/418-1793
I will PROBABLY be purchassing this right away.
check out the site now.
http://www.avelectronic.com/products.htm