My car gets here Thursday. I was reading through several threads and at least a couple of posts suggest that you can't change head units (from the Bose to something new) if you have the navigation system.

Is this true?

 

search for user name skidazzle in video/audio/security/nav/radar

I asked the same question and I don't know the thread off the top of my head.

Yes it is possible and skidazzles solution is pretty slick.