230 Driving and operatingFuelFuel for petrol enginesOnly use unleaded fuel that complieswith European standard EN 228 orequivalent.The engine is capable of running withfuel that contains up to 10% ethanol(e.g. named E10).Use fuel with the recommendedoctane rating. A lower octane ratingcan reduce engine power and torqueand slightly increases fuelconsumption.CautionDo not use fuel or fuel additivesthat contain metallic compoundssuch as manganese-basedadditives. This may cause enginedamage.CautionUse of fuel that does not comply toEN 228 or equivalent can lead todeposits or engine damage.CautionUse of fuel with a lower octanerating than the lowest possiblerating could lead to uncontrolledcombustion and engine damage.The engine specific requirementsregarding octane rating are given inthe engine data overview 3 291. Acountry-specific label at the fuel fillerflap can supersede the requirement.Fuel additives outside EuropeFuel should contain detergentadditives that help prevent engineand fuel system deposits fromforming. Clean fuel injectors andintake valves will allow the emissioncontrol system to work properly.Some fuel does not contain sufficientquantities of additive to keep fuelinjectors and intake valves clean.To make up for this lack ofdetergency, add Fuel SystemTreatment PLUS to the fuel tank atevery engine oil change or every10,000 miles, whichever occurs first.It is available at your workshop.Fuels containing oxygenates such asethers and ethanol, as well asreformulated fuel, are available insome cities. If these fuels comply withthe previously describedspecification, then they areacceptable to use. However, E85(85% ethanol) and other fuelscontaining more than 15% ethanolmust be used only in FlexFuelvehicles.CautionDo not use fuel containingmethanol. It can corrode metalparts in the fuel system and alsodamage plastic and rubber parts.This damage would not becovered by the vehicle warranty.
