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Old 02-27-2011, 12:38 PM
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JimFreeh JimFreeh is offline
Benz addict
Join Date: Mar 2007
Location: Hampton Roads, Virginia
Posts: 3,366
Originally Posted by balge View Post
Standard on both my estates, UK models, but I doubt the home market is different. I repaired a failed one on the '93 and got a definite improvement in cooling, and reduced warm up time


It is (was). Years ago, had a 86 300D non turbo grey mkt car without it.

Pump failure does not affect temp, coolant will push thru the pump.
Pump's purpose is only to promote circulation at idle, otherwise, it's not required. Disconnection or elimination of the pump does not make a noticeable difference. Very, very over-engineered.

Pumps main purpose as they age, is to blow the auto temp control box, requiring a higher current draw than when new.

14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles
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