2007 Mercedes GL-Class Owner's Manual - Page 477

Practical hints What to do if ... Display symbol Display messages Check eng. oil level at next refueling Possible cause/consequence Possible solution The engine oil level is too low. The engine oil level is too low. Check the engine oil level ( page 381). Add engine oil ( page 382) and check the engine oil level ( page 381). N USA only: Add 1 qt. engine oil at next refueling Canada only: Add 1 liter engine oil at next refueling Engine oil level cannot be measured The measuring system is malfunctioning. Have the measuring system checked by an authorized Mercedes-Benz Light Truck Center. When the message Add 1 qt. engine oil at next refueling (Canada: 1 liter) appears while the engine is running and at operating temperature, the engine oil level has dropped to approximately the minimum level. When this occurs, the warning will first come on intermittently and then stay on if the oil level drops further. Visually check for oil leaks. If no obvious oil leaks are noted, drive to the nearest service station where the engine oil should be topped to the required level with an approved oil. For information on approved engine oils, refer to the Factory Approved Service Products pamphlet (USA only) or contact an authorized Mercedes-Benz Light Truck Center. 476