Comfort and Convenience
Cabin temperature divides people more than almost anything else. What one passenger calls comfortable another finds stuffy or cold, so agreeing on a setting, and knowing how to change it quickly, avoids repeated fiddling.
Safety and Driver Assistance
A few minutes before setting off is the easiest moment to work through unfamiliar switches, since nothing is urgent. Drivers borrowing or renting a car benefit most, because habits from another vehicle transfer imperfectly.
Multimedia and Connectivity
If hands-free calling is available, it is typically set up in advance rather than mid-journey; that preparation is what keeps a call simple. Charging and music playback are separate needs, each arranged its own way.