Automatic driving lights control

The following preconditions must be satisfied before the driving light can be activated automatically:

• Light switch in the switch position A (switch position for automatic driving lights control)
• Terminal 15 on
• Rain-light-solar-condensation sensor reports low brightness

The junction box electronics (JBE) or the front electronics module (FEM) or the body domain controller (BDC) module requests the status of the ambient brightness from the rain-light-solar-condensation sensor. The footwell module (FRM) or the front electronics module (FEM) or the body domain controller (BCD) carries out any prompt received to switch the daytime driving lights on or off. The automatic driving lights control switches on the driving light together with the side lights.

Should no signal be received from the rain-light-solar-condensation sensor owing to a defect while the automatic driving lights control is activated, the footwell module (FRM) or the front electronics module (FEM) or the body domain controller (BDC) will respond by switching on the daytime driving lights.

Once the headlamps have been switched on by the automatic driving lights control, they can be switched off again with the light switch or by the rain-light-solar-condensation sensor, provided that ambient lighting of adequate brightness is present. Even after Terminal 15 off the side lights can remain on because they were activated by the automatic driving lights control system. The side lights are switched off automatically when the driver's door is opened. When the occupants exit the vehicle from another door, the side lights are switched off when the vehicle's locks are engaged.

The footwell module (FRM) or front electronics module (FEM) or body domain controller (BDC) switches on the daytime driving light only at low ambient brightness levels. There may thus be a delayed activation of the driving light when the vehicle enters a tunnel or a tree-shaded lane. The light switch must be in switch position A (switch position for automatic driving lights control)