Ok you can say I’m a new-B to Mercedes, I just bought a 1987 300D 6 cylinders diesel engine with 210,000 miles and I paid $450.00 for it. Now the problems that I see are oil coming out of the tail pipe like dripping and a lot of blue smoke. Could this be something to do with the crankcase breather system or something worse like a blow head? She still starts right up and I don’t hear any major knocking sounds but the engine dose shake. Any advise is greatly appreciated thanks in advance.