1984 California cars didn't have EGR valves from the factory, that came later, My 1984 Euro 500 SEC has one that was added when it was Federalized in CA in 1988.

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1986 Euro 500SEC "RUF" 9:1CR, "Rose"
1985 Euro 500SEC Cabriolet AMG Widebody
1982 Euro 500SEL "Blue"
2001 Texas Heeler (Aussie/Queensland X) "Sulphie",
2012 Queensland Red Heeler "Squeak"
Best dogs I've ever had.