Comfort and Convenience
With the key fob inside the cabin, a press of the engine start button closes the starter circuit electronically, so the engine cranks without a key being turned in a barrel.
Safety and Driver Assistance
On wet or loose surfaces a braked wheel can stop turning while the car still moves. ABS releases and reapplies that wheel's line pressure repeatedly, preserving steering but not shortening every stop.
Multimedia and Connectivity
The AUX input accepts an analogue audio signal only, passing sound straight to the amplifier. The USB connection instead carries digital data, letting the head unit read files and control the device.