here man, did some SEARCHING around here and audizine and came up w/ this, http://www.autotoys.com/x/cust/home.php?cat=270i talked to quite a few people on audizine and they used this site.Look for the harnessfor BOSE systems, call them with any questions im sure they have the answers. Good luck. but mack is right if all else fails all you need is a turn on voltage, not a 12V supply

 

Thanx buddy just ordered this
http://www.autotoys.com/x/cust/produ...productid=1194

i hope this does the trick

 

That’s the connection harness, but you should still get the converter I showed you before. It will prevent your radio from blasting out 1000 decibels when its only turned up two notches.

Your aftermarket deck will be putting twice the input wattage into the amp inputs. Then the amp will try to amplify that higher wattage and its going to be extremely loud, and/or pixilated and bad sounding without the premium cable interface. Over time this will burn out your factory amp.

 

funny how i called crunchfield and a few other guys and there is no harness for a audi a4 with bose. call them and ask i'll put money on it that crunchfiled will tell you that it does not exsite for audi the phone number is 18889556000. and on top of that i own a custom car audio shop all my venders even say no interface to power a audi bose system yes there is a harness but no interface. i posted the same queastion on here for that reson thinking someone had one but i hadno luck.