I am looking at buying a Saab 9-3 within the next year or so, the 08-09 years. i know a small window but i love the Saab 9-3 aero with the turbo V6 and the 10+ have a turbo 4. I have found it hard to find an Aero package with the optional navigation. If I was to buy anyway a Saab without the optional navigation could i purchase from a saab dealer the navigation unit and have them install it in my saab? also with the bluetooth, i have noticed that the steering wheel has the bluetooth buttons to make a call and end a call. Does the standard radio unit without navigation have bluetooth? or is it with the navigation unit, and can it work with the steering wheel controls?