[ctuna]

This harness does not apply to top Hi Fi because of the Fiber Optic connection(the one in entry 13 but Technic has Top Hi Fi solutions to I believe.) between Head Unit and Amp. The Top Hi Fi is harder to modify.
There are other solutions for that system all the solutions are listed in the audio table of contents thread.
http://www.e90post.com/forums/showthread.php?t=641323

also FYI

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...2&d=1260829447
http://www.e90post.com/forums/attach...1&d=1209780605
http://www.e90post.com/forums/attach...1&d=1209780865
http://www.google.com/url?sa=t&rct=j...QNFyu70IsyKRlg
http://www.musicarnw.com/page-2/
http://www.e90post.com/forums/attach...4&d=1278871872