M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

Low Coolant Light but fluid is at the level

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Old Jul 22, 2016 | 10:23 PM
  #1  
jayxgomez's Avatar
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From: Las Vegas
ML500 2002
Low Coolant Light but fluid is at the level

I have a 2002 ML500 the Low coolant light has come on. It drives fine when on highways but then will start to heat up above normal operation. The fan kicks works but I'm not sure if it kicks into a high speed. Any suggestions ?
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Old Jul 22, 2016 | 11:29 PM
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Maj. Dundee's Avatar
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2002 ML 320 & 2006 ML500
When it is fine with hwy. speeds but not at idle, it is the Fan Clutch that must be replaced.
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Old Jul 22, 2016 | 11:46 PM
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ML500 2002
Would that cause the low coolant light to come on as well ?
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Old Jul 23, 2016 | 06:14 AM
  #4  
Maj. Dundee's Avatar
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From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Yes it could trigger the light, but do this easy test to find out if the Fan Clutch is operating correctly.
Attached Thumbnails Low Coolant Light but fluid is at the level-fan-clutch-testing.jpg  
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Coolant Level.PDF (11.2 KB, 388 views)
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Old Jul 23, 2016 | 07:53 AM
  #5  
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Thanks I'll try that tomorrow.
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Old Jul 23, 2016 | 08:02 AM
  #6  
Maj. Dundee's Avatar
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Please UPDATE YOUR PROFILE in USER CP to include the year and where you live.
Attached Thumbnails Low Coolant Light but fluid is at the level-aaaaaaaaab.jpg  
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