Comfort and Convenience
Cabin temperature is a common everyday preference. A passenger wearing a coat may want cooler air, while a driver in lighter clothes may prefer more warmth on the same trip.
Safety and Driver Assistance
Before leaving for an early appointment, it helps to sit parked and find the lights, wipers and demister. Those controls are then already known if the weather changes on the way.
Multimedia and Connectivity
On a long wait outside a sports club, a parent may want a podcast from the phone. Playback can stay on the handset, or use the car audio if that option is present.