Thanks for the advice. I just finished reading a thread over at the diesel forum in which several people stated that.

So, before I even look at the service manual, let me ask you these: 1) where is that aux. water pump located in my car? 2) How do I measure how much current it is drawing?

Thanks,

Richard

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver