Comfort and Convenience
Cabin temperature is a common point of disagreement, because people differ in clothing, activity and personal tolerance. A setting that suits the driver may feel cool or stuffy to someone sitting behind, so agreeing on it early helps.
Safety and Driver Assistance
Knowing where the essential controls sit before setting off means lights, wipers and demisting can be adjusted without hunting through menus mid-journey. A few minutes parked is a calmer time to learn than moving traffic.
Multimedia and Connectivity
Phone battery drains quickly on longer trips when navigation runs, so it is worth checking which charging option is available and keeping a suitable cable aboard rather than relying on whatever a passenger happens to carry.