I've walked away from a used MBenz I was interested in buying when I spotted green stains around the pump. And yup, green in the overflow tank, and yes... a jug of prestone in the garage sitting on the shelf behind the car.

When asked the seller about use of green... he mentioned the cooling system parts that had to be replaced... when I told him green was wrong for the car... he was personally offended because "he was a heavy duty diesel mechanic" and thought I should shut up. I did. And just walked away.

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Cheers!
Scott McPhee

1987 300D