Lets clarify something - on a prevoius post "When full, the oil level is about a pint above the sensor's mount (in other words, about a pint spills out when you remove the sensor. Then, it would appear that the level would have to drop at least another inch before the float would move and maybe another half inch to inch before the level sensor would trip. I would say that means on my car the oil would have to be down about 2-3 quarts from full or 1-2 below add on the dipstick before the level sensor would trip.".This oil is measured with engine off.
When the engine is running, the high flow pump has a couple of quarts circulating through the engine and the "static oil level" drops to a "Running oil level" condition.This is a testament to the MB engineers thinking: Design the oil sensor so it signals with 1 quart low with engine running and doesn't give false signals turning corners or during accel or stoping.
If the sensor was placed above this level it would flash at all times the engine is running OR when you turned a corner.
So if you think the oil sender is too low, consider all the thought which went into its placemtne to give an accurate signal at running condition without false signals.
RobEngineer