Comfort and Convenience
The start button only completes the ignition request once the key is recognised and the brake is pressed; it starts the engine, it does not set how warm or quiet the cabin becomes.
Safety and Driver Assistance
The driver's airbag inflates from the steering wheel hub after an impact has already begun, so it changes how a collision is absorbed, never whether the car reaches the vehicle ahead.
Multimedia and Connectivity
The USB connection carries digital audio files and device data over the cable, so the head unit reads stored tracks directly and can usually keep a connected phone charged.