Comfort and Convenience
The engine start button works together with the keyless entry system: the car senses an authorised fob nearby, so pressing the button replaces turning a barrel, while the on-board computer reports status on the display.
Safety and Driver Assistance
ABS acts on braking, pulsing pressure so a locked wheel keeps steering grip. The electronic stability program works differently, braking individual wheels to correct a skid the driver has not asked for.
Multimedia and Connectivity
The USB connection carries digital audio data and device power over one cable, so tracks are read as files by the head unit rather than transmitted as the compressed wireless stream Bluetooth uses.