Mercedes-Benz Forum - View Single Post - 2001 E-320 Station Wagon - Low Coolant Sensor
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post #23 of (permalink) Old 05-23-2019, 08:10 AM Thread Starter
hadam
BenzWorld Member
 
Date registered: Nov 2005
Vehicle: 1997 E-420, 2001 E-320, 2007 S-550, 2009 E-350
Location: California
Posts: 331
Mentioned: 2 Post(s)
Quoted: 26 Post(s)
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(Thread Starter)
mrboca, some update. Yesterday I got the new Windshield Washer Fluid Reservoir Level Sensor. I remove the old washer fluid level sensor and install the new washer fluid level sensor.

After installation, I measured the resistance of new washer fluid level sensor and it was right on the money 176.8 Ohms.

After I connected the connector back to new washer fluid level sensor and started the car, no more coolant low level message. I connected my Autel diagnostic tool, No more codes, all cleared up.

So here the conclusion. Even though I was getting Coolant Expansion Tank Low Level Warning, and Code on reader as short on wiring of washer fluid level sensor/Expansion coolant tank level, the Problem was the Windshield Washer Fluid Reservoir Level Sensor.

It is bad design by Mercedes to display wrong message on IC when the problem was somewhere else. Anyhow the issue is now resolved.

Big thanks to all of you for your support. Special thanks to mrboca for info on all the resistance of individual level sensor and whole loop resistance.
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2001 MB E-430 Gone- Totaled
2009 MB E-350
2001 MB E-320
2003 MB CLK-320 Cabriolet
1997 MB E-420
2007 MB S-550
2011 MB G-550

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