I would be almost positive that you can match those o rings at the parts store unles there is some weird metric o ring or something. Like i said if that doesnt work you can call Inter auto parts in san diego and have them ship it to you

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68 250s SOLD
78 300d non turbo SOLD
1980 240d manual SOLD
1981 300SD 360,000 miles I think she's doomed for a parts car but has a good engine SOLD the engine to spamman
1977 300d non turbo SOLD
1985 300SD california car
1978 240D Manual