Rain-Light Sensor For Automatic Driving Lights Control: Notes

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 ambient light conditions outside the vehicle.

In twilight conditions, the rain-light sensor transmits the message "Twilight" so that the automatic headlight-range adjustment can activate dipped headlights. The headlights are tilted up and down as required, but they are not yet moved towards the bend in the road.
In darkness, the rain-light sensor sends the message "Darkness". The adaptive headlights are then activated when the vehicle is cornering. The headlights are moved to the left or right:

NOTE: This enclosure describes the rain-light sensor on the E60, E61, E63, E64. The contents apply accordingly for the rain-light sensor on the E65, E66 and E90. Differences are described in the relevant section.

The rain-light sensor detects water on the windscreen and the ambient brightness. The signals of the rain-light sensor control the wiper function, the automatic driving lights control and the adaptive headlights control unit. Rain-light sensor is mounted in base of interior rearview mirror.