Hey leathermang, you might be correct, but there are lots of positive testimonies on the Duracool (don't think I've seen a single negative from anyone who has actually tried it). And on the vacuum, if the device can generate a vacuum as well as a pump, then there shouldn't be any difference. Pulled a nice 25-30 Hg vaccum for about 30 minutes with that tool.

I'll report back in the next 6-12 months and let everyone know how things are going.

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Treiberg's Collection: 1981 240D, 1985 300SD, 1992 300E, 1997 E300D, 2005 C230K