Comfort and Convenience
Cabin temperature is a common point of disagreement, because people differ in clothing, body size and how long they have been sitting still. Agreeing a setting early usually prevents repeated adjustment during a journey.
Safety and Driver Assistance
Locating the main controls before setting off means less time spent searching once a journey begins. Lights, wipers, mirrors and hazard switches are worth finding while the car is still stationary.
Multimedia and Connectivity
Charging is the need that tends to surface first, since passengers often board with depleted phones; if a suitable socket or port is available, agreeing who uses it avoids mid-journey negotiation.