Method for operating a motor vehicle lighting device with automated dipping function

The method involves communicating a control device (5) with an image pickup device (6) i.e. camera, where the control device determines traffic situation based on images from the image pickup device and controls an LED (4) to dim based on the determined result. Lighting operation of the LED is modulated with frequency that is different from another frequency, so that brightness changes are represented based on the frequency difference. The traffic situation is determined by the control device by analysis of the images successively. An independent claim is also included for a motor car comprising an illumination device with automated dipping function.