2009 Mercedes R-Class Owner's Manual - Page 405
2009 Mercedes R-Class Manual
Page 405 highlights
Technical data Fuels, coolants, lubricants etc. Brake fluid G Warning! During vehicle operation, the boiling point of the brake fluid is continuously reduced through the absorption of moisture from the atmosphere. Under extremely strenuous operating conditions, this moisture content can lead to the formation of bubbles in the system, thus reducing the system's efficiency. Therefore, the brake fluid must be replaced regularly. Refer to your vehicle's Maintenance Booklet for replacement interval. Only brake fluid approved by Mercedes-Benz is recommended. Any authorized MercedesBenz Center will provide you with additional information. with premium unleaded gasoline as soon as possible. RAvoid RDo Premium unleaded gasoline (gasoline engine) 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. Extinguish all smoking materials. Direct skin contact with fuels and the inhalation of fuel vapors are damaging your health. ! To maintain the engine's durability and performance, premium unleaded gasoline must be used. If premium unleaded gasoline is not available and low octane gasoline is used, follow these precautions: RHave the fuel tank only partially filled with unleaded regular gasoline and fill up full throttle driving and abrupt acceleration. not exceed an engine speed of 3 000 rpm if the vehicle is loaded with a light load such as two persons and no luggage. not exceed 2/3 of maximum accelerator pedal position if the vehicle is fully loaded or operating in mountainous terrain. RDo Fuel requirements Gasoline engine Only use premium unleaded gasoline. The octane number (posted at the pump) must be 91 min. It is an average of both the Research Octane Number (RON) and the Motor Octane Number (MON): (RON+MON)/2. This is also known as the ANTI-KNOCK INDEX. Reformulated gasolines (RFG) and/or unleaded gasoline containing oxygenates such as ethanol, TAME, ETBE, IPA, IBA, and TBA can be used provided the ratio of any one Z 403
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