[ctuna]

Before you plunge into a aftermarket Head Unit
There is some stuff you should know about putting a
aftermarket head unit in a E9x.
There are some side effects and things to consider.
The BMW Radio or I drive is integrated into the car in such
a way that if you remove it you will not be able to get software
updates or repairs at BMW dealer without remounting the original
BMW Head Unit.
To get around this some do a parallel mount of the original Head Unit in the trunk.
Additionally depending on what options you have they may cause
error messages or cease to work and cause error messages.
SOS will cause a error message if the original radio is removed.
I also have read you will loose at least the audio indicators if you have PDC
and in some models the chimes come through the stereo speakers
via the radio.

Also if you happen to have the Logic 7 sound system there is only one
aftermarket Head Unit that will interface with the Logic 7 amp
and that is the Dynavin N6 with a logic 7 adapter built for the N6.
(because of the proprietary fiber optic interface between the amp
and head unit)

head unit
http://www.e90post.com/forums/showth...ight=head+unit
http://www.e90post.com/forums/showthread.php?t=1036190
http://www.e90post.com/forums/showth...hlight=dynavin
http://www.janus-design.net/english/
http://www.e90post.com/forums/showthread.php?t=355089
http://www.e90post.com/forums/showth...ight=head+unit
http://www.e90post.com/forums/showth...hlight=dynavin
http://www.e90post.com/forums/showth...hlight=dynavin
http://www.e90post.com/forums/showth...light=retrofit
http://www.e90post.com/forums/showthread.php?t=993447
http://www.e90post.com/forums/showthread.php?t=1016187
http://www.e90post.com/forums/showth...hlight=dynavin

BMW stereo types
http://www.e90post.com/forums/showthread.php?t=352586
http://www.e90post.com/forums/attach...2&d=1266451970
http://www.e90post.com/forums/attach...2&d=1260829447
http://www.e90post.com/forums/showthread.php?t=343673
http://www.e90post.com/forums/showthread.php?t=138949
http://www.e90post.com/forums/attach...1&d=1209780605
http://www.e90post.com/forums/showthread.php?t=641323
http://bmwcoders.com/forum/3-er-8/bm...1-e92-e93-291/
http://www.e90post.com/forums/attach...1&d=1209780865
http://www.google.com/url?sa=t&rct=j...,d.cGU&cad=rja
http://www.musicarnw.com/page-2/
http://www.e90post.com/forums/attach...4&d=1278871872