Comfort and Convenience
Cabin temperature is the classic point of disagreement: one person feels a draught where another wants more air. Preferences differ with clothing, seating position and simply how each body responds, so agreeing a setting early keeps the peace.
Safety and Driver Assistance
Before setting off it is worth finding the wipers, lights, hazard switch and demist function while the car is still stationary. Sorting that out at the kerb means less fumbling later, when attention belongs on the road.
Multimedia and Connectivity
Keeping a phone charged matters most on longer runs, when navigation drains the battery fastest. Where a car provides a suitable power outlet or socket, a passenger can handle the cable and leave the driver alone.