Comfort and Convenience
Cabin temperature is a good example: some people want steady warmth while others prefer cooler air with airflow directed away from the face. Clothing, the season and simple personal tolerance all pull the choice in different directions.
Safety and Driver Assistance
Preparation matters most when attention is needed elsewhere. Working out how the hazard lights, horn and headlight settings operate while stationary means that later, in traffic or poor weather, the hand already knows roughly where to go.
Multimedia and Connectivity
Hands-free calling is the need that most often shapes how a phone is set up, since it keeps conversation possible without handling the device. Music playback and charging remain separate matters, each depending on what a given car supports.