Actually, in my '83 300TD, '83 240D, and '87 300D I've_never_taken out
that center stem in the oil filter cover...just the two nuts alongside
it and pulled the whole thing straight out. Since all my filter sets
only had the O-ring and the copper washer, I never saw the need to
disassemble anything else to get the job done...
The last time I bought filters (a dozen) I got Knecht filters on eBay.
Use the search function, enter your car model, such as "300D" and the
words "oil" and "filters".
There are auctions right now for 4 Mann filters for $23.95 plus
Ray 300SD 84
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