Comfort and Convenience
Preferred cabin temperature is rarely the same for everyone, since clothing, seating position and personal tolerance all differ. Agreeing on a setting before setting off, or adjusting gradually, usually keeps a shared journey pleasant.
Safety and Driver Assistance
Locating lights, wipers, mirrors and hazard switches while still parked is simple preparation, since hunting for an unfamiliar control during a journey pulls attention away from driving. Passengers can help by asking beforehand.
Multimedia and Connectivity
Keeping a phone charged matters most on longer trips, when navigation and messaging drain the battery. If charging points are available, deciding who uses them avoids the small negotiations that crop up between passengers.