I think that I omitted that part where I changed the unit and it was still leaking in the same place. Thanks for the tip. I didn't replace the washers. I'll try that out and report back.

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1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k