I just talked to their support. I've used one for my Audi e-tron GT, and am now putting one into my Macan Turbo Electic. You will want "model A."
These do *not* make use of the OEM pre-wire. Instead, they use a Y-harness that hooks into the rain sensor power using legitimate connectors -- once...
As far as I understand, the ACC needs additional sensors that cannot be installed and calibrated at a service center, it has to be done at the factory. My guess is you're better off selling your current car and buying one with the feature you want instead.