Comfort and Convenience
Cabin temperature is a common point of disagreement, since people sitting in different seats, wearing different clothing, or sensitive to draughts rarely want the same setting. Asking rather than assuming usually settles it quickly.
Safety and Driver Assistance
Locating lights, wipers, mirrors and hazard switches before setting off keeps attention on the road later. A few quiet minutes while parked are easier than hunting for a control mid-journey with passengers aboard.
Multimedia and Connectivity
On longer trips a phone battery drains quickly, especially with navigation running. Where charging is available, agreeing who uses it avoids a flat handset; calls and music are separate questions from keeping power.