So Far I have, and this is for a 2009 VW GTi:

 

-Pioneer PAC-SWI (Not CAN, Just PAC-SWI.. Is this one okay?)

-Pioneer CD-IU230V (iPod cable)

-AVIC-F700BT

 

What else do I need in order for this navi to work and keep the steering wheel buttons? Thanks! And Happy Halloween. I am a newbie! =(