Enabling Pilot Assist and Adaptive Cruise Control

[IMAY2023]

Does anyone noticed difference between ACC version3 and version 4? Or maybe someone knows the difference?))

My car did not came with ACC and PA, I upgraded it but changing the hydraulic unit and official PA upgrade software. 
After that original setting was ACC version 1 with PA level 1 
I changed the PA level 3 and ACC version 4. 
Result: PA detects the lanes much faster, better turns in curves and ACC is much more responsive to traffic.  ACC still not perfect. 
For example: 
You set the speed to 40 miles in town and road is almost empty. 
You approach to stopped car at a traffic light, car symbol appears on dash above distance lines. 
Most of the time de-acceleration is late, you feel like it's going to crash. So, watch out. 
On the other hand, in traffic (real stop and go) it's performing much better.