Comfort and Convenience
Sensitivity to light varies widely. Some passengers want bright, open glass and a clear view outwards; others prefer shade and reach for sunglasses early. Eyesight and simple habit explain much of the difference.
Safety and Driver Assistance
Familiarity with the basic controls is best built while stationary. Mirrors, hazard lights and the horn are easier to find by feel later if they have been located once, calmly, before setting off.
Multimedia and Connectivity
Hands-free calling is a distinct function from music playback. Where it is supported, a call arrives through the speakers and the audio pauses, which keeps a conversation from becoming a two-handed task.