When I registered my 1985 300D the person at the Secretary of States office looked in the book and said that my car was $32,000 at time of retail. So you're in the ballpark.

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Frank
84 500SEL EURO 101K ( JUST LIKE MY 1ST WIFE. GLAD TO GET RID OF HER! )
85 300D 310K (sold)
90 350SDL 184K sold
83 300D 118K (sold)
88 300E 153k (sold)
93 400E 105K (sold)