Did the CA models have EGR in 1980? My most recent purchase
an 80 300SD has EGR and looks like the original engine.

My daily driver also an 80 300SD does not have EGR.

Glad your making progress mattdave! Hang in there you'll be glad you did.

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1980 300SD Manganese Brown Metallic Clearcoat 248k
1979 300SD White 148 k
1984 300D Silver project car for daughter
1982 300D wrecked
1980 300SD 310K not running