Comfort and Convenience
Preferred cabin temperature is rarely shared. One person drives warm and another cool, and the same setting can suit a short errand yet feel wrong an hour later, which is why heating and ventilation settings get used so often.
Safety and Driver Assistance
A few minutes before setting off is a good time to locate the basics: lights, wipers, mirrors, hazard switch. Doing it while parked means one less unfamiliar thing to work out once traffic is already moving.
Multimedia and Connectivity
Keeping a phone charged on a long drive is a separate need from playing music or taking a call. Where a charging point is provided, knowing its location and routing the cable tidily keeps it out of the way.