Comfort and Convenience
Some travellers want fresh air moving constantly; others prefer a closed, quiet cabin. The preference often follows sensitivity to stuffiness, noise or smells, so it varies between the driver and the passengers alongside.
Safety and Driver Assistance
Time spent before departure setting mirrors and reading the instrument symbols is rarely wasted, particularly in an unfamiliar car. Knowing what a warning light means saves guessing about it later on an unknown road.
Multimedia and Connectivity
Calls on the move are a separate need from music. If hands-free calling is available, the useful detail is whether the other party can hear clearly; otherwise, stopping to answer remains the straightforward option.