lane assist (active)lane assist (active) - Warning and indicator lamps - Instruments and warning/indicator lamps - Controls - Audi A4 Owner's Manual - Audi A4

the system is fully functional. You will be warned if you are about to cross the The indicator lamp confirms that the system is fully functional. You will be warned if you are about to cross the lane markings detected by the system.

For more information on the lane assist system, please see.