2004 Mercedes ML-Class Owner's Manual - Page 215

Operation At the gas station Replace the fuel cap by turning it to the right. You will hear when the fuel cap is tightened. Close the fuel filler flap. i Leaving the engine running and the fuel cap open can cause the yellow fuel tank reserve warning lamp to flash and the ? lamp to illuminate. See also "Practical hints" section ( page 248). Check regularly and before a long trip Open the hood ( page 217) i Use only premium unleaded gasoline with a minimum Posted Octane Rating of 91 (average of 96 RON/86 MON). Information on gasoline quality can normally be found on the fuel pump. More information on gasoline can be found in the Factory Approved Service Products pamphlet. 1 Engine oil level 2 Coolant level For normal replenishing, use water (potable water quality). More information on the coolant level can be found in the "Operation" section ( page 222). 3 Brake fluid 4 Windshield washer system and headlamp cleaning system* More information on filling the reservoir can be found in the "Operation" section ( page 224). 215