Driving and operating 129The control indicator ! extinguishesas soon as the self-cleaningoperation is complete.If A illuminates additionally, cleaningis not possible, seek the assistance ofa workshop.Catalytic converterThe catalytic converter reduces theamount of harmful substances in theexhaust gases.CautionFuel grades other than those listedon pages 3 145, 3 202 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.Automatic transmissionThe automatic transmission makesautomatic shifting possible(automatic mode) and the versionwith ActiveSelect also makes manualshifting possible (manual mode).Transmission displayThe mode or selected gear is shownin the transmission display.
