I'd stay away from them. You can find plenty of nice mid-90's E class that won't rattle and without the rust (depending upon what geographic area you look). If your not too tied to a geographic area, you can find plenty of low mileage, NO RUST E class vehicles in Florida.

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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)