Comfort and Convenience
Preferred cabin temperature varies widely: a setting one person finds pleasant feels stuffy to another. Clothing, time of day and where someone sits all play a part, so agreeing early avoids constant adjustment.
Safety and Driver Assistance
Spending a minute before setting off to locate the lights, wipers, hazard switch and horn is simple preparation. Doing that while parked means those controls are not being found for the first time in moving traffic.
Multimedia and Connectivity
Keeping a phone charged matters most on long drives, especially when it also shows the route. If a suitable charging option is available, deciding where the phone rests keeps it reachable and out of the way.