Comfort and Convenience
Preferred cabin temperature varies widely. What one occupant calls pleasantly warm another finds stuffy, and rear passengers sit away from the front vents, so agreeing on a setting often takes compromise.
Safety and Driver Assistance
Time spent before setting off, angling the mirrors and locating the indicator and demister controls, means fewer unfamiliar reaches once the car is moving and attention belongs on the road.
Multimedia and Connectivity
Hands-free calling and music are different tasks. A call needs the microphone and speakers working together, whereas playback only needs an audio source, so one may be set up without the other.