86 Instruments and controlsInterference due to external sourcesof ultrasound. Once the source ofinterference is removed, the systemwill operate normally.Have the cause of the fault in thesystem remedied by a workshop.Ultrasonic parking assist 3 138.Electronic Stability Controlb illuminates or flashes yellow.IlluminatesA fault in the system is present.Continued driving is possible. Drivingstability, however, may deterioratedepending on road surfaceconditions.Have the cause of the fault remediedby a workshop.FlashesThe system is actively engaged.Engine output may be reduced andthe vehicle may be brakedautomatically to a small degree.Electronic Stability Control offn flashes yellow.Flashes when the system isdeactivated.Traction Control system offk flashes yellow.Flashes when the system isdeactivated.Preheating and diesel particlefilter! illuminates or flashes yellow.IlluminatesPreheating activated. Only activateswhen outside temperature is low.FlashesIf the diesel particle filter requirescleaning and previous drivingconditions did not permit automaticcleaning. Continue driving and ifpossible do not allow engine speed todrop below 2000 rpm.! goes off as soon as the self-cleaning operation is complete.Diesel particle filter 3 124.Tyre pressure monitoringsystemw illuminates or flashes yellow.IlluminatesTyre pressure loss. Stop immediatelyand check tyre pressure.FlashesFault in system or tyre withoutpressure sensor mounted (e.g. sparewheel). After 60 - 90 seconds thecontrol indicator illuminatescontinuously. Consult a workshop.Engine oil pressureI illuminates red.Illuminates when the ignition isswitched on and goes out shortly afterthe engine starts.
