Remember: When it leaks, the MB stuff (and other German stuff, like VW Autobahn) smells like crayons, not maple syrup/pancakes as US stuff smells. I once heard the Car Talk guys get stumped by this scent -- car was a VW that smelled like crayons when the heat was on. They suggested looking for crayons down in the defrost vents -- not a leaking heater core which was probably the problem.

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David
1986 300E Anthracite + ECodes + MB Mileage Award