I learned the hard way too with my first Benz. A 1980 300 CD. The diaphram in the vac. pump developed a tear. Must have dumped a quart of oil into the air breather before I noticed any problems. I had oil in all the vacuum lines through the firewall and up under the dash. Had to dismantle each vacuum ball and blow the lines clear. Didn't know much about diesels then. But thanks to Pic N Pull I was able to cure my problem.

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Selling used Mercedes parts on Ebay...always changing...
cdplayer51 take a look!
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