Comfort and Convenience
Cabin temperature divides people more than almost anything else. One occupant finds a setting pleasant while another beside them feels it too cool, so agreeing on a compromise before a short trip saves fiddling.
Safety and Driver Assistance
Familiarity with basics such as hazard lights, demisting and the parking brake comes from trying them unhurried rather than mid-journey. Preparation of that kind is simply knowing where your hand should go.
Multimedia and Connectivity
Calls arriving mid-errand are common, and handling them without holding a handset is the practical aim. Where hands-free telephone functions are present, answering becomes a button press instead of a rummage through pockets.