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Old 02-20-2002, 12:43 PM
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mikemover mikemover is offline
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Join Date: Aug 2001
Location: Atlanta, GA
Posts: 5,514
It was my understanding that the aux. water pump is supposed to ensure that coolant gets to the heater core at lower RPMs, so that you have heat when the car is idling.

1979 300 SD
350,000 miles
1982 300D-gone---sold to a buddy
1985 300TD
270,000 miles
1994 E320
not my favorite, but the wife wanted it
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