216 Driving and operating● The vehicle had an accident or ifthe area surrounding thedetection sensor is damaged ornot properly repaired.● There are extreme temperaturechanges.● The vehicle is towing a trailerIn the event of a fault in the system orif the system does not work due totemporary conditions, the symbols inthe mirrors will be permanentlyilluminated and a message isdisplayed in the Driver InformationCentre. Seek the assistance of aworkshop.Lane change alertAdditional to the side blind zoneassist 3 214, lane change alertrecognizes rapidly approachingvehicles from behind on parallel lanesnext to your vehicle.If the vehicle has lane change alert,then side blind zone alert is alwaysincluded.The system alerts visually in eachexterior mirror when detecting rapidlyapproaching vehicles from behind.The radar distance sensors arelocated in the rear bumper.9 WarningLane change alert does notreplace driver vision.Before changing a lane, alwayscheck all mirrors, look over theshoulder and use the turn signal.When the system detects anapproaching vehicle from behindwhich drives considerably faster, theyellow warning symbol F willilluminate in the relevant exteriormirror. If the driver then activates theturn signal, the warning symbol Fstarts flashing yellow as a warning notto change lanes.Lane change alert is active at allspeeds.When the vehicle is started, bothexterior mirror displays will brieflycome on to indicate that the system isoperating.