Comfort and Convenience
Some passengers prefer still air, while others like a light breeze from a slightly open window if that is available. The better option is simply the one that suits who is travelling that day.
Safety and Driver Assistance
Locating the hazard switch and any fuel-filler control before you leave means a late-evening stop does not become a hunt around an unfamiliar cabin. Doing this while the vehicle is still parked keeps the first miles simpler.
Multimedia and Connectivity
If a passenger wants an audiobook on a quiet stretch, play, pause, and volume need to be reachable without passing a phone around. If not, the simple habit is to set the episode at a rest stop.