2004 Mercedes G-Class Owner's Manual - Page 225

Operation At the gas station 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. Check regularly and before a long trip Brake fluid ! If you find that the brake fluid in the brake fluid reservoir has fallen to the minimum mark or below, have the brake system checked for brake pad thickness and leaks immediately. Notify an authorized Mercedes-Benz Light Truck Center immediately. Do not add brake fluid as this will not solve the problem. For more information, see "Practical hints" ( page 254) . Windshield/rear window washer system and headlamp cleaning system For more information on refilling the reservoir, see "Windshield/rear window washer system and headlamp cleaning system" ( page 234). i Leaving the engine running and the fuel cap open can cause the ? malfunction indicator lamp to illuminate. See also "Practical hints" section ( page 256). 1 Coolant 2 Brake fluid i Opening the hood, see ( page 227). Coolant For normal replenishing, use water (potable water quality). For more information, see "Coolant level" ( page 232) and see "Fuels, coolants, lubricants, etc." ( page 333). 225