The 300TD was the first turbodiesel W123 (one year earlier than the 300D). Also, my '84 federal 300TD has the same vacuum system as the '84 Calif / '85 Federal 300D (again, beating the federal 300D by one year).

So... yesterday I went to look at an '85 300TD. It had a trap oxidizer... the owner told me that _all_ 1985 wagons have the trap oxidizer. Is this true? I almost believe him as my '84 federal wagon has the same vacuum system / emissions as the '84 california car. Perhaps the same could be true for '85 federal wagons...

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1985 MBZ 300DT
1969 MBZ 220d
1984 MBZ 300TDT
1981 VW Vanagon