The interior light switch of a Citroën DS is a crucial component for the car's interior lighting. It is designed to control the lighting within the car's cabin, allowing you to easily turn the interior light on or off. This offers convenience and visibility in the dark. The switch is often streamlined and complements the stylish interior of the classic Citroën DS, an iconic French car from the 1960s and '70s. The wiring is generally straightforward, allowing easy installation and replacement for enthusiasts and restorers of these vintage vehicles.