2011 Mercedes ML-Class Owner's Manual - Page 361

Service products and capacities Octane Number (MON): (RON + MON) / 2, also known as knock resistance. Reformulated Gasoline (RFG) and/or unleaded gasoline with additives can be used if the concentration of the additives in the fuel does not exceed 10%, e.g.: REthanol RTAME RETBE RIPA RTBA 359 Information on the fuel grade can usually be found on the gas pump. If the information cannot be found on the gas pump, ask service station personnel. For further information, contact an authorized Mercedes-Benz Center or visit http://www.mbusa.com (USA only). Diesel engines - Fuels containing biodiesel (FAME [fatty acid methyl ester]) Mercedes-Benz USA approves the use of B5 (ULSD with a maximum of up to five percent by volume biodiesel) for all diesel engines with common rail direct injection (CDI) and BlueTEC. Pure biodiesel and diesel fuels that contain a higher percentage of biodiesel, e.g. B20, may cause damage to the fuel system/engine and are, therefore, not approved. For further information, please ask the service station personnel. The label on the gas pump must indicate clearly that the B5 biodiesel blend meets the ULSD standard. If the label is not clear, do not refuel the vehicle. The Mercedes-Benz Limited Warranty does not cover damages caused by the use of fuels not meeting Mercedes-Benz approved fuel standards. For MTBE, the concentration should not exceed 15%. The concentration of methanol in gasoline including other additives must not exceed 3%. Using mixtures of methanol and ethanol is not permitted. Gasohol, a mixture of 10% ethanol and 90% unleaded petrol can be used. All of these mix fuels must fulfill the fuel requirements, e.g.: Rknock Rboiling Diesel engines - important safety information ! Only use commercially available ULTRALOW SULFUR DIESEL FUEL (ULSD, 15 ppm MAXIMUM SULFUR) that meets the ASTM D975 standard. Failure to use ULTRA-LOW SULFUR DIESEL FUEL (ULSD) can severely damage the vehicle's exhaust gas aftertreatment system. Additives in gasoline One of the major problems in engine design is the creation of carbon deposits during the process of burning fuel. Mercedes-Benz recommends that you use fuel brands that have the additives which prevent the build up of carbon deposits. If you use fuels without these additives for a longer period of time, there may be a build up of carbon deposits, especially on the inlet valves and in the combustion chamber. This could lead to engine running problems, e.g.: Rwarm-up Runstable ! Do not fill the tank with gasoline. Do not blend diesel fuel with gasoline or kerosene. Otherwise, the fuel system and the engine will be damaged. Damage resulting from the use of gasoline or kerosene is not covered by the Mercedes-Benz Limited Warranty. To prevent malfunctions, diesel fuel with improved flow characteristics is available in the winter months. Check with your fuel retailer. hesitation idle Rknocking/pinging Z Technical data resistance point Rvapor pressure