2006 R 500 add a liter of oil light comes on every 2500kilomters. Have has a sensor changed, a hot oil flush, and it still comes on, they tell me no leak and its withn the accpetable m-benz oil consumption ratio. Really, evey 2500k a liter of oil? What can I do, I need some help to correct this problem or at least diagnose it correctly, its costing me a lot of money with no answers or problem solved.
If there are no leaks, the engine has to be burning it. You may not see if from the exhaust because of the emissions system, but that is what must be happening. Oil doesn't evaporate and if there are no leaks, that is all that is left.