Adaptive headlights for automatic driving lights control

The automatic driving lights control feature (option in conjunction with the rain-light sensor) switches the side lights and dipped beam headlights on and off automatically.

Switch-on conditions:

• The light switch cluster must be coded with automatic driving lights control.
• The light switch must be in position "A" ("A" for automatic driving lights control and the adaptive headlights).
• The rain-light sensor must be installed and operational.

  The rain-light sensor detects the brightness of the ambient light. The rain-light sensor sends the following requests to the light switch cluster:

  • low ambient brightness (twilight, darkness, in a low-level garage or tunnel):

    "switch on dipped beam headlights" request

  • sufficient ambient brightness: "switch off dipped beam headlights" request

    If only the side lights are to be switched on, the light switch must be set to side lights (position 1).

When the light switch is set to position "A", the AHL control unit is also activated:

• When the automatic driving lights control function switches on the dipped beam headlights (e.g. at dawn/dusk), the adaptive headlights function is notified at the same time.

  The light switch cluster sends the message "Dipped headlights on" to the AHL control unit (and the AHL control unit assumes control of the automatic headlight-range adjustment).

• The control module for the exterior lighting also evaluates the signals from the rain - light sensor (LSZ = light switch cluster or LM = light module for E60, E53). The headlights are not turned when the vehicle is cornering until total darkness sets in.

The message "Dipped headlights on" is generated separately for each headlight unit.

If one of the headlights fails, the turning movement of the adaptive headlights is deactivated.

The front fog lights are switched on in order to ensure a minimum level of illumination.