C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Check Coolant Warning...but it's full

Old Nov 27, 2013 | 01:32 AM
  #1  
Koru_Kinshi's Avatar
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2018 E63S AMG, 2003 SLK 230 Sport, 2004 SL 600, 2006 SLK 55 AMG, 1998 E320 Wagon
Check Coolant Warning...but it's full

So on occasion I'm getting a check coolant warning message on my C230, but I've checked it multiple times.

It's practically full. I'm guessing it's a faulty sensor? Anyone have insight on this?


Also if it's as simple as that, is it easy to replace on your own?
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Old Nov 27, 2013 | 03:48 AM
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From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
Some 203's suffer this when the windscreen wash water container is MT.
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Old Nov 27, 2013 | 06:52 AM
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mercedes cl500
Next time you have some time go out when ur car is cold like in the morning and pull the coolant cap off and start ur car turn the heat on hot and high and let it run till it reaches running temp then put the cap back on. You might have an air bubble in the Lines.
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Old Nov 30, 2013 | 06:52 PM
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Originally Posted by junctionvip
Next time you have some time go out when ur car is cold like in the morning and pull the coolant cap off and start ur car turn the heat on hot and high and let it run till it reaches running temp then put the cap back on. You might have an air bubble in the Lines.
Interesting. Thanks for the tip.
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