My '84 300D does in fact have an EGR and it is not a California model.
Randall, you can easily find it on the front of your engine. It is a
tube looking device that is connected from the exhaust manifold, and
goes to the intake manifold. EGR stands for "Exhaust Gas
Recirculation", and does just that. It recirculates exhaust back into
the combustion stream.
It is possible that the 79 model does not have it, but I am betting
that it does. On my engine, the tube is metal, and at the "top" where
it comes from the exhaust (or intake) manifold, there is a "flying
saucer" shaped device with a vacuum hose running to it (this is the
actual valve). I'll look for a picture of it, and see if I can post
My car is a 1982 California car, and it came stock with an EGR valve.
I think it was the first year to have one. Mine is bypassed and the
engine runs fine and several mechanics, including the owner of Metric
Motors, the rebuilder who remanufactured my engine, have assured me
that the bypass of the EGR will not cause any problems, although it
may make passing a smog test problematical.
I live in extremely rural Eastern California, and we are not required
to get our cars smogged here.
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