Comfort and Convenience
Preferred cabin temperature is a good example of a personal setting: the same air feels warm to one passenger and cool to the next, shaped by clothing, time of day and simple habit rather than any single correct number.
Safety and Driver Assistance
A few unhurried minutes before setting off, spent locating the lights, wipers, demister and hazard switch, turn an unfamiliar cabin into a known one. Preparation of that kind is cheap, and it is easiest while stationary.
Multimedia and Connectivity
Keeping a phone charged on a long drive is its own need, separate from calls or music. If a suitable socket or cable is available, it is worth knowing where it sits before the battery runs low.