Comfort and Convenience
One person prefers a warm cabin while a passenger wants cooler air, largely because clothing and personal sensitivity vary. Agreeing on a setting before departure saves adjusting things repeatedly along the way.
Safety and Driver Assistance
Knowing where the hazard switch and demister controls sit is worth a moment before pulling away, since an unfamiliar layout is hardest to learn when something else already needs attention.
Multimedia and Connectivity
Hands-free calling is a different function from music playback. A car may route a call through its speakers while audio comes from another source, so it is worth checking each separately.