2003 Mercedes G-Class Owner's Manual - Page 219

Operation Engine compartment If you see the message OBSERVE WAITING PERIOD With the dipstick If engine is at normal operating temperature, wait five minutes before repeating check procedure. If the engine is not yet at normal operating temperature, wait 30 minutes before repeating check procedure. If you see the message: ENGINE OIL LEVEL - NOT WHEN ENGINE ON Oil dipstick Turn off the engine. If engine is at normal operating temperature, wait five minutes before checking oil. If the engine is not yet at normal operating temperature, you must wait 30 minutes before checking oil. More information on engine oil can be found in the "Technical data" section ( page 316). 1 Oil dipstick 2 Oil filler cap Remove oil dipstick 1. Wipe oil dipstick 1 clean. Fully insert oil dipstick 1 in tube, and remove after three seconds to obtain accurate reading. The oil level is correct when it is between the lower (min) and upper (max) mark of the dipstick. Add engine oil if necessary. i Fill quantity between upper and lower dipstick marking, the level is approximately 2.1 US qt (2.0 l). 219