They are also listed in Fastlane here:http://catalog.eautopartscatalog.com/mercedesshop/sophio/wizard.jsp?partner=mercedesshop&clientid=catalog.mercedesshop&baseurl=http://catalog.peachparts.com/&cookieid=1XZ0NWULG1XZ0NX7KV&year=1984&make=MB&model=300-SD-002&category=J&part=AT+Modulator+Cap
(For some reason, I have found this part under 126 models but have noticed that it is not under 123 models. I believe it is just a data entry glitch.)

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Sam

84 300SD 350K+ miles ( Blue Belle )