Comfort and Convenience
Cabin temperature is a good example of preference: one person is content with fresh air through the vents, another wants the climate held steady. Shared cars usually settle into a compromise between the people using them.
Safety and Driver Assistance
Time spent before setting off, adjusting mirrors, checking the seating position and noting how indicators and demisting are operated, is preparation rather than delay, and it counts for most in unfamiliar or borrowed cars.
Multimedia and Connectivity
Hands-free calling is the need that often decides how a phone is set up, since errands invite interruptions. Where such a function is present, audio playback and power supply are arranged separately and need their own attention.