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Originally Posted by sundeac
The Mercedes dealer replaced the rear main seal two months ago on my 2000 ML320. A $900 job. I just noticed today the seal area is leaking worse than before. This is crazy. It is tricky to replace these? Is it possilbe to not install these properly?
Thanks in advance.
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NOTE: IF Mercedes parts were used and the work done by a dealer, it is guaranteed for 1 or 2 years. They should redo it for free, labor included.
You could have a stuck pressure regulator piston in your oil pump and the extremely high pressure is blowing the seal out. I bet they didn't check the oil pressure with a cold engine, if at all.
Jim in PHoenix