body is shot - dont know how much you paid but if it was anything under $2000 then junk the body , pull and keep the following :-

suspension bits
engine and tranny
interior

Look for a mint 450SEL (regular 4.5 v8) that has high miles. toss the motor and do a swap

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1982 300SD (214 k, excellent shape) kidmobile running mostly biodiesel, gets 31 mpg hwy with 2.82 rear from a euro 500SEL



1976 115 body 240D 4-speed (traded for Jeep parts) - Engine lives on in my CJ7