Thanks for that write-up, Ta2Resqr! I know you did it the other way around, but does anyone know if installing the radar-unit on a PP if the adaptive-CC just comes to life and work? Or is some Forscanning required to "activate" it? Also, is the active steering-assist also potentially adaptable to PPs?
The problem is it is not just the radar unit. The radar unit is a completely separate cruise control module from the non-adaptive model. Then, you need to have the steering wheel from a driver assist model because all of the controls are there. Then there is programming. The module needs to communicate with the IPC, PCM, RCM, ABS, SCCM, and BCM. The Radar/module is ~$1400 MSRP.
By steering assist, I assume you are talking the lane keeping support. Much like Adaptive Cruise Control, this is a huge programming deal. This involves the switch, IPM-A, PCM, PSCM, HUD, BCM, IPC, RCM, and SCCM. Not to mention the fact that the switch goes in an already occupied location in the center console.
With the advent of CAN networks, things are no longer ass simple as adding a couple parts. It is much easier to take a hardware based system and add it then it is a computer based system. I do not even know if the wiring needed is on the vehicles already. Things like the different gear ratio and steering ratio can be easily changed in ForScan, adding coolers, changing brake pads/rotors, springs, stabilizer bars, tires, steering wheel, and gears are relatively easy. I think the hardest option to add from the PP would be "Track Mode/true off" for the AdvanceTrac and I think someone already figured out the wiring was there and the ForScan code, it was just a matter of where to put the switch.