164 Driving and operatingCatalytic converterThe catalytic converter reduces theamount of harmful substances in theexhaust gases.CautionFuel grades other than those listedon pages 3 213, 3 281 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.AdBlueGeneral informationThe selective catalytic reduction(BlueInjection) is a method tosubstantially reduce the nitrogenoxides in the exhaust emission. Thisis achieved by injecting a DieselExhaust Fluid (DEF) into the exhaustsystem.The designation of this fluid is AdBlueⓇ1). It is a non-toxic, non-flammable,colourless and odourless fluid whichconsists of 32% urea and 68% water.9 WarningAvoid contact of your eyes or skinwith AdBlue.In case of eye or skin contact,rinse off with water.CautionAvoid contact of the paintwork withAdBlue.In case of contact, rinse off withwater.AdBlue freezes at a temperature ofapprox. -11 °C. As the vehicle isequipped with an AdBlue pre-heater,the emissions reduction at lowtemperatures is ensured. The AdBluepre-heater works automatically.Level warningsThe AdBlue consumption is approx.4000 mpg and depends on the drivingbehaviour.If the AdBlue level falls below acertain value, a level warning AdBlueRange: 1500 mi will be displayed inthe Driver Information Centre.A volume of at least 5 litres of AdBluemust be refilled as soon as possible.Driving is possible without anyrestrictions.1) Registered trademark of the Verband der Automobilindustrie e.V. (VDA).
