I was just speaking to another mercedes guy and he said my oil burning could be a bad diaphram in the vacuum pump, pushing oil into the cylinders. What do you think? I don't have any oil in the air cleaner as blowby. I also forgot to say the engine compression is 400, 400, 400, 380. Could a bad vacuum diaphram cause oil burn? Car starts and shuts off fine, all vacuum acc. work fine also. Thanks for your help.