Comfort and Convenience
Preferred cabin temperature varies widely between people, shaped by clothing, the weather they have just come in from and plain habit. Where settings can be adjusted, agreeing on them before setting off avoids constant fiddling.
Safety and Driver Assistance
Before a longer trip it helps to locate the hazard switch, wipers and mirror adjusters while still stationary. Preparation of that kind means fewer moments spent glancing down for a control once traffic is moving.
Multimedia and Connectivity
Keeping a phone charged matters most when the same phone is handling navigation, since mapping draws on the battery steadily. Where a suitable power outlet exists, a cable of the right type and length is worth carrying.