Greetings Wilton,

I learned after my first experience with a so called import MB mechanic, that the DIY'S items need to be either accomplished by youself or someone you trust. First off, if you suspect the vacuum pump as one that is failing, I'd follow the vacuum line coming off the pump to the intake manifold and disconnect it there and run the engine for a short period of time to see if it is actually pulling oil from the engine and feeding your intake. I did this simply by removing the plastic line from the air filter housing and rubber bandind a small white sock to the end of it and running the car to work, some 40 miles. Looking at the white sock after the trip told the whole story that I was losing quite a bit of oil through the pump, it was dripping wet when I got there. Do this first to determine whether you actually have a problem that needs fixing. If you do please post again and I will gladly go through the procedure to replace the diaphragm.

Charles