I just plugged in the 8.4AN/RA4 with the NAV. into my truck. I am coming from a Uconnect 3.0. Everything works perfect minus the the heat controls on screen. As confirmed you need the steering wheel controls to adjust the volume and you need to get a mic for the bluetooth to work since the 3.0's didn't come with it. I can hear them they can't hear me. But I'm working on that. If you can get one cheap (i paid 160 for mine) it is well worth the upgrade IMO.