Comfort and Convenience
Preferred cabin temperature differs widely; one person settles on a cool setting while the passenger beside them asks for warmth. Clothing, position relative to the vents and personal tolerance account for much of that gap.
Safety and Driver Assistance
Adjusting the seat and mirrors, then noting where the main switches sit, belongs to the stationary part of a journey. Preparation done at the kerb removes fumbling that would otherwise arrive at a busy junction.
Multimedia and Connectivity
Calls are easier to handle when audio runs through the car instead of a handheld device. Where such a function is offered, the practical meaning is simple: conversation continues without a phone occupying one hand.