Fuel consumption , fuel, refuellin g 99Fuel consumption,fuel, refuellingFuel c onsum ptionOptional equip ment (e.g. w id e ty res, airconditioning system, tow ing equipment)increases the k erb weight and in somecases also the permissible gross vehic leweight. This in turn increases fuelconsumption and reduc es the m aximumspeed of the vehicle.When the vehicle is new, there is increasedfriction between the engine andtra nsmission components lasting forseveral thousand miles. This inc reases fuelconsumption.Fuel for petrol enginesC om mercially availab le high-quality fuelwith a max imum ethanol content of 5 % asper DIN EN 228 (catalytic c onverter - seepag e 102, octane numbers - seepage 163). Fuel quality has a d ecisiveinfluence on p ow er output, runningbehaviour and service life of the engine.The ad ditiv es conta ined in the fuel play animportant role in this reg ard. Y ou shouldtherefore only use high-quality fuelscontaining additives.Fuels with etha nol content grea ter than 5 %do not comp ly with DIN EN 228 and m ustnot be used unless the vehicle has beenspec ifically dev eloped and ap prov ed foruse of such.Fuel with too low an octane number cancause pink ing. Va ux hall cannot be heldliable for resulting damage.Petrol with a hig her octane number canalway s be used .Pump nozzles for leaded fuel ca nnot beinserted into the filler nec k of vehicles tha toperate on unlead ed fuel.The ignition timing is automaticallyadjusted according to the grad e of fuelused (octane num ber) – see page 163.Use of petrol with an octane rating of 95will ensure economical driv ing.Fuel consump tion .... ..... .... ..... .... .... ..... 99Fuel for petrol engines . .... ..... .... .... ..... 99Fuel for diesel engines.. .... ..... .... .... ..... 100Refuelling . .... .... ..... .... ..... .... ..... .... .... ..... 100