The Turbo Oil Inlet gasket shows up in the 3rd drawing as #155.
See if the number matches the one you got from the Dealer.
#185 is the Gaket for the Oil Drain.
http://www.detali.ru/cat/oem_mb2.asp?TP=1&F=123193&M=617%2E952&GA=722%2E120315&CT=M&cat=143&SID=18&SGR=075&SGN=03

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84 300D, 82 Volvo 244Gl Diesel