Comfort and Convenience
Cabin temperature is one of the clearest examples: what one occupant calls comfortably warm another finds stuffy. Clothing, circulation and simply what someone is used to all shift the preferred setting.
Safety and Driver Assistance
Preparation matters most for the controls used without looking — indicators, wipers, demisting. Working out where they sit while parked makes it easier to keep looking ahead rather than down at an unfamiliar stalk.
Multimedia and Connectivity
Hands-free calling and music playback are distinct functions, and a system may handle one without the other. Charging is separate again, since a cable that carries power does not always carry audio.