Driving and operating 169indicated by illumination of% and awarning message in the DriverInformation Centre.% illuminates along with a warningmessage illuminates when dieselparticle filter is full. Start cleaningprocess as soon as possible.% flashes along with a warningmessage when diesel particle filterhas reached the maximum fillinglevel. Start cleaning processimmediately to avoid damage to theengine.Activate self-cleaning processTo activate cleaning process,continue driving, keep engine speedabove 2000 rpm. Shift down ifnecessary. Diesel particle filtercleaning is then started.Cleaning takes place quickest at highengine speeds and loads.Control indicator % extinguishes assoon as the self-cleaning operation iscomplete. Keep on driving until self-cleaning operation is complete.CautionIf possible, do not interruptcleaning process. Drive untilcleaning is completed to avoid theneed for service or repair by aworkshop.Cleaning process not possibleIf cleaning is not possible for anyreasons, control indicator Zilluminates and a warning messageappears in the Driver InformationCentre. Engine power may bereduced. Seek the assistance of aworkshop immediately.Catalytic converterThe catalytic converter reduces theamount of harmful substances in theexhaust gases.CautionFuel grades other than those listedon pages 3 230, 3 291 coulddamage the catalytic converter orelectronic components.Unburnt petrol will overheat anddamage the catalytic converter.Therefore avoid excessive use ofthe starter, running the fuel tankdry and starting the engine bypushing or towing.In the event of misfiring, unevenengine running, a reduction in engineperformance or other unusualproblems, have the cause of the faultrectified by a workshop as soon aspossible. In an emergency, drivingcan be continued for a short period,keeping vehicle speed and enginespeed low.
