Rain-Light Sensor
WARNING: This page does not describe the selected car, but rather 46 other vehicles, including the 2008 BMW M5, 2008 BMW 650i, 2007 BMW Z4, 2007 BMW M6, and 2007 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.
The rain-light sensor measures the brightness of the ambient light. The light module switches the low-beam headlights on when daylight fails.
The main-beam assistant can be activated only when the low-beam headlights are on. The precondition is that the light switch must be in the "A" position.
For more information, please refer to SI Technology (SBT) 63 02 03 007