2010 Mercedes GL-Class Owner's Manual - Page 374

372 Fuels, coolants, lubricants, etc. TBA can be used provided the ratio of any one of these oxygenates to gasoline does not exceed 10%; MTBE must not exceed 15%. The ratio of methanol to gasoline must not exceed 3% plus additional cosolvents. Using mixtures of ethanol and methanol is not allowed. Gasohol, which contains 10% ethanol and 90% unleaded gasoline, can be used. These blends must also meet all other fuel requirements, such as resistance to spark knock, boiling range, vapor pressure, etc. Please ask your service station personnel for further information. If the B5 biodiesel blend is not sufficiently labeled to clearly indicate that it meets the ULSD standard, please do not use it. The Mercedes-Benz Limited Warranty does not cover damages caused by the use of fuels not meeting Mercedes-Benz approved fuel standards. Gasoline additives (gasoline engine) A major concern among engine manufacturers is carbon build-up caused by gasoline. Mercedes-Benz recommends only the use of quality gasoline containing additives that prevent the build-up of carbon deposits. After an extended period of using fuels without such additives carbon deposits can build up, especially on the intake valves and in the combustion area, leading to engine performance problems such as: RWarm-up RUnstable Diesel engine Only use commercially available vehicular ULTRA-LOW SULFUR HIGHWAY DIESEL FUEL (ULSD, 15 ppm SULFUR MAXIMUM) that meets the ASTM D975 standard. Failure to use ULTRA-LOW SULFUR HIGHWAY DIESEL FUEL (ULSD) can severely damage the vehicle's exhaust after-treatment device. To prevent malfunctions, diesel fuel with improved cold flow characteristics is offered in the winter months. Check with your fuel retailer. Technical data hesitation idle ! Do not fill the tank with gasoline. Do not blend diesel fuel with gasoline or kerosene. The fuel system and engine will otherwise be damaged, which is not covered by the Mercedes-Benz Limited Warranty. For further information on diesel fuel pump labeling, contact an authorized MercedesBenz Center or visit www.mbusa.com (USA only). Biodiesel (FAME = Fatty Acid Methyl Ester) containing fuels Mercedes-Benz USA approves the use of B5 (standard ULSD which may contain a maximum of 5% biodiesel) in all Common-rail injection (CDI) and BlueTEC diesel engines. Diesel fuels containing a higher percentage of biodiesel, e.g. B20, as well as straight biodiesel may cause severe damage to your engine/fuel system and are not approved. RKnocking/pinging RMisfire RPower loss In areas where carbon deposits may be encountered due to lack of availability of gasoline which contains these additives, the use of Mercedes-Benz approved additives is recommended. Contact an authorized Mercedes-Benz Center or visit www.mbusa.com (USA only) for a listing of approved products. Follow directions on the product label. Do not blend other fuel additives with fuel. This only results in unnecessary cost and may be harmful to the engine operation. ! Damage or malfunction resulting from poor fuel quality or from blending additional fuel additives other than those tested and approved by us for use on Mercedes-Benz