Audio Upgrade

[Road2Ruin]

I have a 9-3 sportwagon with the infotainment system (not sure which one). However, it doesnt support the AVR or bluetooth, which I would really like. I have an option to get hold of the system that incorporates the SAT NAV and wonder if its a simple swap out job with the current unit or is it a lot more complicated? ANy advice greatly appreciated.

Peter