I saw this yesterday from Powerful UK. I found it very interesting. To my untrained eye it seems that LR fit everything necessary for Adaptive Cruise Control (except perhaps the steering wheel switch*?) but then make sure it is turned off. Presumably if you were to specify this as an extra in your new build you'd pay far more than the cost of the switch...

* I wasn't certain from the video whether Powerful had fitted a new switch or not...

 Robin
2008 Range Rover Sport TDV8
Gone:
Jaguar S-Type V8 4.2 Sport
MGZTT 190 2.5