150 Driving and operatingFaultThe lane departure warning systemmay not operate correctly when:■ the windscreen is not clean■ there are adverse environmentalconditions like heavy rain, snow,direct sunlight or shadows■ no lane marking can be detectedIf lane departure warning systemdetects one of these conditions,control indicator ) illuminates yellow.FuelFuel for petrol enginesOnly use unleaded fuel that complieswith DIN EN 228.Equivalent standardised fuels with anethanol content of max. 10 % byvolume may be used. In this case onlyuse fuel that complies withDIN 51625.Use fuel with the recommendedoctane rating 3 201. Use of fuel withtoo low an octane rating can reduceengine power and torque and slightlyincreases fuel consumption.CautionUse of fuel with too low an octanerating could lead to uncontrolledcombustion and engine damage.Fuel for diesel enginesOnly use diesel fuel that complieswith DIN EN 590. The fuel must havelow sulphur content (max. 10 ppm).Equivalent standardised fuels witha biodiesel (= FAME according toEN14214) content of max. 7% byvolume (like DIN 51628 or equivalentstandards) may be used.Country-specific exception forMorocco: use Diesel 50 ppm only.Do not use marine diesel oils, heatingoils or entirely or partially plant-baseddiesel fuels, such as rape seed oil orbio diesel, Aquazole and similardiesel-water emulsions. Diesel fuelsmust not be diluted with fuels forpetrol engines.The flow and filterability of diesel fuelare temperature-dependent. Whentemperatures are low, refuel withdiesel fuel with guaranteed winterproperties.
