Comfort and Convenience
Cabin temperature is a preference people rarely share. Body size, clothing and where someone sits relative to vents or glass all change how warm a setting feels, so an agreement reached early saves repeated adjustment later.
Safety and Driver Assistance
Before setting off with others, it is worth locating the basics, such as lights, wipers, demisting and hazard warning, while the car is stationary. Learning them in motion divides attention at the moment it is needed elsewhere.
Multimedia and Connectivity
Battery level is the usual concern on longer trips, since navigation drains a phone steadily. If a charging point is available on board, keeping a suitable cable in the car matters more than the socket itself.