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Old 05-14-2000, 04:29 PM
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Join Date: Jan 2000
Location: Long Island, NY USA
Posts: 195
Greeting MB Techies-
My Y2k E55 has illumiated its low coolant! warning message again. Last time, you guys mentioned something about the windshield washer...This time, coolant, windshield and headlamp reserviors are all OK. last time I got a "No Problem Found" at the dealer. This time I'd like to be armed (and dangerous if necessary). What do you guys suspect, a wire or sensor? I'm also going to ask them to tweak the computer for performance. Anything specific I should ask for?
My plan of attack is to take the service manager (and receptionist) for a little high speed run on the back roads of the north shore of Long Island until they beg for mercy or wet themselves (whichever comes first) . Thanks in advance for your advice.

00 AMG E55
96 DCM Impala SS
94 ZR-1
81 Corvette Cpe
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Old 05-14-2000, 06:50 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The w/s washer resrevoir sending unit is tied to the coolant level sending unit in series. If either goes open or short circuit then low coolant lamp comes on!! The w/s washer reservoir sending unit is a common failed part, esp with high levels of w/s antifreeze in the reservoir.

27 YEARS DEALER M.B. Shopforeman
1986 190E 16V
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Old 05-14-2000, 08:55 PM
Posts: n/a
The dealer can use the Star Diagnosis and it will give them the specs. for both the washer and coolant sensor. The one that is closest to being out of specs is the culprit.

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