Comfort and Convenience
Where people want a drink bottle, sunglasses or a phone to live varies. Some prefer everything within arm's reach of the seat; others would rather keep the cabin clear and stow items out of sight.
Safety and Driver Assistance
Reading through the handbook section on instrument warnings costs a few minutes at home. Knowing what an unfamiliar symbol means saves puzzling over it later, far from home and with less time to think.
Multimedia and Connectivity
Taking a call on a long drive is common, and it helps to know in advance whether the car can handle it hands-free. That question is separate from music playback, which may work through a different source entirely.