Pete

I think he's looking for the thread size.
Here you go ( at the top above the picture):
http://catalog.worldpac.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1XC0ZKQX926B14EW2I&year=1993&make=MB&model=190-E-005&category=A&part=Oil+Drain+Plug

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2007 C 230 Sport.