142 Driving and operatingImportant hints for using theparking assist systems9 WarningUnder certain circumstances,various reflective surfaces onobjects or clothing as well asexternal noise sources may causethe system to fail to detectobstacles.CautionPerformance of the sensor can bereduced when sensors arecovered, e.g. ice or snow.Performance of the parking assistsystems can be reduced by a levelchange of the sensors.Particular conditions apply for highvehicles (e.g. off-road vehicles,mini vans, transporters). Objectidentification in the upper part ofthe vehicle can not be guaranteed.Objects with a very small reflectioncross section, like objects ofnarrow size or soft materials, maynot be detected by the system.Parking assist systems are noteffective in assisting drivers inavoiding unexpected objects.NoticeThe parking assist systemautomatically detects factory-fittedtowing equipment. It is deactivatedwhen the connector pluged in.Sensor could detect a nonexistingobject (echo disturbance) caused byexternal acoustical or mechanicdisturbances.Advanced parking aid system maynot respond to changes in theparking space after initiatinga parallel parking manoeuver.Lane departure warningThe lane departure warning systemobserves the lane markings in whichthe vehicle is driving via a frontcamera. The system is detecting lanechanges and warns the driver in theevent of an unintended lane changeby visual and acoustic signals.Criteria for the detection of anunintended lane change are■ no operation of turn signals■ no brake pedal operation
