2011 Mercedes S-Class Owner's Manual - Page 514

512 Service products and capacities Vehicle model Airconditioning system Windshield/ headlamp cleaning system All models Capacity - Fuel, coolant, lubricants etc. Refrigerant R134a and special PAG lubricant (never R 12) MB windshield washer concentrate42 (Y page 515) Mixing ratio for washer fluid (Y page 515) All models 6.9 US qt (6.5 l) Fuel Important safety notes G Warning Gasoline is highly flammable and poisonous. It burns violently and can cause serious personal injury. Never allow sparks, flames or smoking materials near gasoline. Turn off the engine before refueling. Whenever you are around gasoline, avoid inhaling fumes and any skin or clothing contact. Direct skin contact with fuels and the inhalation of fuel vapors are damaging to your health. Technical data rest as soon as possible with premiumgrade unleaded gasoline. Rdo not drive at the maximum speed. Ravoid sudden acceleration. Rwhen the vehicle is carrying a light cargo, e.g. two passengers without luggage, do not allow the engine to rev above 3000 rpm. Rwhen the vehicle is fully loaded or being operated in mountainous terrain, do not depress the accelerator pedal further than 2/3 of the pedal travel. Fuel requirements Use only premium-grade unleaded gasoline. The octane number should be at least 91. Details can be found on the gas pump. The octane number is the average value of the Research Octane Number (RON) and Motor 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 Premium-grade unleaded gasoline ! To ensure the longevity and full performance of the engine, only premiumgrade unleaded gasoline must be used. If premium-grade unleaded gasoline is unavailable and regular gasoline is used, observe the following precautions: Ronly fill the fuel tank to half full with regular unleaded gasoline and add the 42 Mixed with water or premixed washer fluid with antifreeze protection.