Comfort and Convenience
The on-board computer is scrolled through with a steering-wheel or stalk control, and each press swaps the display for another running calculation, such as consumption or range derived from fuel flow and distance covered.
Safety and Driver Assistance
Emergency brake assist reads how fast the pedal is pushed. If that rate suggests panic, it raises line pressure to full braking straight away, rather than waiting for the driver's own leg force to build.
Multimedia and Connectivity
The USB port carries data as well as charge, so a connected phone or memory stick hands its track list to the head unit, which then displays titles and takes skip commands from the car's own controls.