Automatic headlamp levelling, bus information

Bus message	Type of information	Transmitter	User
Headlamp beam adjustment, fault indicator active	ON/OFF	AHL	MIU
Dipswitch	0, 1, 2	BCM	AHL
Key position, ignition switch	Caps Off On Start	CIM	AHL
Brake pedal, contact active	ON/OFF	ECM	AHL
Front left wheel speed	rpm	TCS/ESP	AHL
Rear right wheel speed	rpm	TCS/ESP	AHL
Front right wheel speed	rpm	TCS/ESP	AHL
Rear left wheel speed	rpm	TCS/ESP	AHL