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Old 12-10-2000, 11:14 AM
Posts: n/a
On my W116, 300SD I always disconnect the electrical wires going to my heating water pump, which is right next to to the climate control servo. I believe it's job is to pump hot coolant through the heater hoses. I make a self made tool out of two 3-4 foot lengths of wire each with an alligator clip on one end and a butt connector on the other ends. I hook the pump up to the battery directly while filling the coolant reservoir.

I do this because my manual say's to. Is this needless or a good idea?
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