Comfort and Convenience
Cabin temperature is a common point of disagreement between occupants, since people differ in how warm they like to be and rear passengers often notice airflow differently from those in front.
Safety and Driver Assistance
Controls are quicker to use once their positions are already known, so a few minutes spent with the handbook beforehand saves hunting for an unfamiliar switch mid-journey.
Multimedia and Connectivity
Hands-free calling asks different things of a system than music does: a call needs clear speech and quick answering, so it is worth checking call audio separately from playback.