Thanks for that information Hatterasguy. I am hoping that this one has a soft and supple ride. At any rate- I am going to go take a closer look at the 90 300SE tomorrow to make an assessment. He initially said he wanted "around" $4900 for it, but I am not sure at this time. He really does not even seem that motivated to sell it. He owns the car lot, but he is driving the car daily and keeping it parked behind or to the side of the building. He said it was his wifes car, but he bought her a newer S-Class sedan and he has been driving the 90 SE. My uncle that has the 89 300 wagon (also with the 3.0L I6), said these engines are bulletproof. At 161K, his has been totally trouble free. Thanks again.

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2004 Toyota Sequoia Limited 4wd
1991 Lincoln Town Car Executive
1991 Cadillac Sedan DeVille
1988 Mercedes 300SEL
1972 Chevrolet Caprice Kingswood Estate 9-passenger wagon
1973 Pontiac Grand Ville
(Prior MB's: 1974 240D, 1985 380SE, 1984 190D, 1993 400SEL)