Which part of the vehicle does this position of the rotary switch control?

[JulianLee]

This position of the rotary switch controls the fog lights. Here is an introduction to the purpose of fog lights: Fog lights are installed at the front and rear of the vehicle. They are used for road illumination and safety warning when driving in rainy or foggy weather. Classification of fog lights: Fog lights are divided into front fog lights and rear fog lights. Front fog lights are generally yellow, while rear fog lights are red. The symbols for rear fog lights are slightly different from front fog lights - the light lines of the front fog light symbol point downward, while the rear fog light symbol lines are parallel. These symbols are usually located on the instrument control panel inside the vehicle. In foggy weather, front and rear fog lights are typically used together.