What common feature might be integrated with the headliner to provide additional functionality?

The integration of lighting fixtures with the headliner is a prevalent design choice in automotive interiors. Headliners, which are the material covering the ceiling of a vehicle, can serve both aesthetic and functional purposes. By incorporating lighting fixtures, such as ambient lights or reading lights, manufacturers enhance the overall experience for passengers.

This integration allows for a more cohesive design, as the lighting can be seamlessly embedded into the headliner itself, providing illumination without the need for additional separate fixtures. Moreover, it contributes to the vehicle's atmospheric quality, offering versatility in how light is distributed throughout the cabin space.

Integrating other options, such as seats, air vents, or alarm systems, with the headliner is less common and less practical. Seats require their own structural support and mechanisms for function, while air vents need to be strategically positioned to provide effective airflow. Similarly, alarm systems typically rely on independent components rather than being merged with the headliner. Thus, lighting fixtures become a natural and popular feature to enhance functionality and design within the automotive interior.