Driving and operating 177The driver assistance systems donot relieve the driver from fullresponsibility for vehicleoperation.Lane departure warningThe lane departure warning systemobserves the lane markings betweenwhich the vehicle is driving via a frontcamera. The system detects lanechanges and warns the driver in theevent of an unintended lane changevia visual and acoustic signals.Criteria for the detection of anunintended lane change are:● no operation of turn signals● no brake pedal operation● no active accelerator operation orspeeding-up● no active steeringIf the driver is performing theseactions, no warning will be issued.ActivationThe lane departure warning system isactivated by pressing ). Theilluminated LED in the buttonindicates that the system is switchedon. When the control indicator ) inthe instrument cluster illuminatesgreen, the system is ready to operate.The system is only operable atvehicle speeds above 35 mph and iflane markings are available.When the system recognises anunintended lane change, the controlindicator ) changes to yellow andflashes. Simultaneously a chimesound is activated.DeactivationThe system is deactivated bypressing ), the LED in the buttonextinguishes.At speeds below 35 mph the systemis inoperable.FaultThe lane departure warning systemmay not operate properly when:● the windscreen is not clean● there are adverse environmentalconditions like heavy rain, snow,direct sunlight or shadows
