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Old 01-15-2003, 01:52 PM
Registered User
Join Date: Nov 2002
Location: Tulsa, OK
Posts: 7
2001 C320 Coolant Check Level Light

the last couple of days my check coolant light has displayed on my screen when I first start the car up in the morning. After that the rest of the day it is fine. I checked the overflow tank it is fine. Before I take it in, if it was easy I would do it my self. Any suggestions? By the way I did a search but didn't find the answer.
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Old 01-15-2003, 02:31 PM
Achieving Salvation
Join Date: Sep 2002
Location: Madison, Wis.
Posts: 223
Maybe something to do with the coolant level sensor that trips the light in the cabin?
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Old 01-15-2003, 08:19 PM
Live to Learn
Join Date: Mar 2002
Location: Raleigh NC
Posts: 145
Have you checked it cold? Being that fluid expands when it is hot, it can be below the sensor when cold and appear OK when hot.
Mercedes Benz Master Tech
ASE Master Technician
Diagnostic Technician
Owner of "Behind the Star Inc."
Raleigh NC.
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Old 01-16-2003, 03:05 AM
Registered User
Join Date: Dec 2002
Location: monclova coahuila mexico
Posts: 23
please just fill it. on a 2001 SLK we go to benz dealer and they add a few drops... and the light turn's off.
sorry grammatic's.
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Old 01-16-2003, 10:18 AM
Posts: n/a
I know this sounds dumb but on my 99 SLK230, I had this problem. After replacing two or three coolant level sensors under warranty, someone discovered that the sensor circuit was tied into the windshield washer fluild level as well. After that, I keep the windshield washer fluid topped up as well and it has never happened again.
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