Comfort and Convenience
Cabin temperature divides people more than almost anything else: one passenger wants steady warmth, another prefers cool air and an open vent. Agreeing a setting early saves repeated fiddling with the climate controls.
Safety and Driver Assistance
Before a first drive it helps to set the mirrors, find the parking brake and check how the gear selector behaves. Doing this while stationary keeps attention on traffic once the car is moving.
Multimedia and Connectivity
Taking a call without holding the handset is the usual reason drivers connect a phone at all. Music playback is a separate matter, and charging is separate again, depending on the sockets available.