2007 Mercedes CLK-Class Owner's Manual - Page 476

Technical data Fuels, coolants, lubricants, etc. Brake fluid During vehicle operation, the boiling point of the brake fluid is continuously reduced through the absorption of moisture from the atmosphere. Warning! Premium unleaded gasoline Warning! G ! To maintain the engine's durability and performance, premium unleaded gasoline must be used. If premium unleaded is not available and low octane fuel is used, follow these precautions: Have the fuel tank only partially filled with unleaded regular and fill up with premium unleaded as soon as possible. Avoid full throttle driving and abrupt acceleration. Do not exceed an engine speed of 3000 rpm if the vehicle is loaded with a light load such as two persons and no luggage. Do not exceed 2/3 of maximum accelerator pedal position if the vehicle is fully loaded or operating in mountainous terrain. G Gasoline is highly flammable and poisonous. It burns violently and can cause serious personal injury. Never allow sparks, flame or smoking materials near gasoline! Turn off the engine before refueling Whenever you are around gasoline, avoid inhaling fumes and skin or clothing contact, extinguish all smoking materials. Direct skin contact with fuels and the inhalation of fuel vapors can be damaging to your health. 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. An authorized Mercedes-Benz Center will provide you with additional information. 475