Comfort and Convenience
Cabin temperature is a preference people rarely agree on: the setting that suits a driver in a coat can feel stuffy to a passenger beside them. Differences in clothing, seating position and habit all play a part.
Safety and Driver Assistance
A few minutes spent before setting off — finding the hazard switch, the demister, the horn — means those things are already known when a street suddenly demands them. Preparation is easiest while the car is still parked.
Multimedia and Connectivity
Keeping a phone charged is its own need, separate from calls or music: a battery drained by navigation matters after arrival too. If a charging point is available on board, the useful part is reaching it without unbuckling.