Comfort and Convenience
The on-board computer matters once underway, cycling through trip distance, consumption and range readouts so the driver can judge a fuel stop without stopping to calculate anything.
Safety and Driver Assistance
When a steering input sends the car wider or tighter than intended, ESP brakes individual wheels and trims engine torque, pulling the body back onto the path the steering asked for.
Multimedia and Connectivity
Android Auto uses the cable or wireless link purely as a pipe; the maps, messages and music shown on screen are generated by the phone, so the same connection carries whatever apps it runs.