I finally replaced the factory VW Navigation system in my 2007 GTI MkV with an AVIC Z110BT. I recorded everything I did to replace the old nav with the AVIC and edited it together in a how-to style video, hopefully it'll help a fellow VW owner.
What I Installed:
AVIC Z110BT
PAC SWI-PS - Steering wheel controls for AVIC.
PAC SWI-CAN - Steering wheel controls for GTI to SWI-PS.
VW DD Mounting kit.
PAC C2R-VW - Wiring kit.
Euro Radio Adapter.
The only issue I ran into installing the AVIC is addressed in the video, it has to do with the lower frame piece having two tabs that prevent the frame from snapping into place. I used a Dremel to remove the two tabs.
Side note: If you turn on the vehicle to test the AVIC with the passenger air bag indicator unplugged you will see a air bag fault light/warning on the instrument panel, I took my car to the dealer and they reset it in about 3 minutes for free.
I assume that Jettas come apart the same, but this definitely works for Rabbits/GTIs.