Comfort and Convenience
Cabin temperature is a good example: some people prefer a cool, breezy interior while others find the same setting uncomfortable. Clothing, the weather outside and the length of the trip all feed into where an individual sets it.
Safety and Driver Assistance
Spending a minute with the wipers, lights and mirrors before setting off leaves less to work out later. Preparation of this kind is simply about knowing where things are, especially in a car you drive only occasionally.
Multimedia and Connectivity
Keeping a phone charged through a long day is a practical need in itself, separate from playing music or taking calls. If charging is available on board, it is worth checking which cable or method it expects.