I HAVE A 98 ML 320 WITH JUST UNDER 43000 MILES AND EVER SINCE AROUND 30000 MILES I HAVE NOTICED THE OIL LIGHT FLICKER AND UPON CHECKING THE DASH SENSOR PLUS THE DIPSTICK IT HAS BEEN AROUND 1 AND1/2 QUARTS LOW. THIS HAS HAPPENED 2 TIMES SINCE AROUND 30000 MILES. THE TOOL BAR STILL SHOWS 2400 MILES BEFORE SERVICE. MY WARRANTY RUNS OUT IN NOVEMBER AND AM WONDERING WHAT SHOULD BE CHECKED AT DEALER. OTHERWISE THE TRUCK RUNS WELL. THANKS FOR HELP.