Comfort and Convenience
Cabin temperature is a common point of disagreement, because people differ in clothing, in how they feel the cold, and in where they sit relative to sunlight. Agreeing a setting early usually settles it.
Safety and Driver Assistance
A minute spent with the main controls before setting off is ordinary preparation. Mirrors, seat position and lighting are simply easier to sort out while stationary than in moving traffic with passengers already talking.
Multimedia and Connectivity
Phone battery is the practical concern on longer trips, since navigation drains it steadily. Where a charging point is provided, topping up en route avoids arriving flat; calls and music are separate questions of their own.