Comfort and Convenience
Preferred cabin temperature varies widely: some people are comfortable a few degrees cooler than others, and those sitting behind often feel airflow differently from those in front. Agreeing on a setting early avoids constant adjustment.
Safety and Driver Assistance
Wipers, lights and demisting are needed suddenly, and hunting for them costs attention. A few minutes stationary, locating the main switches and learning their positions by feel, makes those moments routine rather than distracting.
Multimedia and Connectivity
Charging and audio are separate needs. A cable may power a phone without passing music to the speakers, while a wireless link can play sound as the battery drains, so knowing which does what helps.