Comfort and Convenience
The on-board computer is not switched on and off; it runs with the ignition, and the driver instead steps through its readouts, selecting which trip figure the display shows.
Safety and Driver Assistance
The passenger airbag only cushions the head and chest after an impact has already begun. It changes nothing about approach speed, so a following gap remains what prevents the collision.
Multimedia and Connectivity
The audio system's role is source handling: the head unit selects radio or disc, sets volume, and feeds the amplified signal to the cabin speakers from fixed dashboard controls.