Comfort and Convenience
Preferred seating position varies with height, build and habit. Some people sit upright and close to the wheel, others further back with arms extended, so the same cabin suits them differently.
Safety and Driver Assistance
Working out where the lights, wipers and hazard switch sit is easier while parked than in moving traffic. A few minutes before setting off saves searching at an awkward moment.
Multimedia and Connectivity
Charging a phone and playing music from it are separate functions. A socket that supplies power will not always carry audio or calls, so it is worth checking what each connection does.