it's been my experience that bose head units kinda suck, mine crapped out, it doesn't play cd's the display fades in and out, it will randomly switch from radio to cd. im going to replace it shortly, i have heard you need a PAC-ROEM NIS2 to use a new headunit with the facory speakers. here is an ebay link to the product
http://cgi.ebay.com/PAC-ROEM-N...86644