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Low coolant warning on 2012

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Old 08-26-2019, 11:07 AM
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Low coolant warning on 2012

First got this last year during the winter. Happened during cold starts. Was told its no big issue so I got it topped it up about 6 months ago.

Now, I get a low coolant warning again when cold starting. Should I just top it off again or check for some problems? Did a search but didnt yield many results.
Old 08-26-2019, 11:24 AM
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Is your car leaking coolant?

Secondly, I would check my oil to make sure your oil and coolant aren’t mixing. If so, get your head gasket replaced before you blow your motor. Just my $0.02.
Old 08-26-2019, 11:29 AM
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Originally Posted by TLIBZ
Is your car leaking coolant?

Secondly, I would check my oil to make sure your oil and coolant aren’t mixing. If so, get your head gasket replaced before you blow your motor. Just my $0.02.
I dont notice any leaks on floor of place I park. How can I check for potential oil/coolant mixing?
Old 08-26-2019, 11:30 AM
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Relax. Your car is fine. You don’t have a head bolt or HG problem. Your car isn’t blowing up either. Coolant levels expand and contract with temps in the overflow tank, and over time you get evaporation etc. Totally normal, I have a light right now too because my car has been sitting in a cold garage for months. You’re probably just slightly low. Throw some distilled water in the overflow reservoir to top it off. It has been discussed before.
Old 08-26-2019, 11:31 AM
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Originally Posted by BLKROKT
Your car is fine. You don’t have a head bolt or HG problem. Coolant levels expand and contract with temps in the overflow tank, and over time you get evaporation etc. Totally normal, I have a light right now too because my car has been sitting in a cold garage for months. You’re probably just slightly low. Throw some distilled water in the overflow reservoir to top it off. It has been discussed before.
Thanks. Yes, the distilled watter top-off is what I've seen too. Just want to make sure with the forum that I dont need to double check any components for failure.
Old 08-26-2019, 11:35 AM
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Toronto - make that a top off with coolant or Diesel WaterWetter.

No symptoms, no codes, car running fine? Then it’s just the overflow tank evaporation / contraction.

If you see plumes of white smoke or milky tan-colored oil, or your car is misfiring and down on power that’s when you worry. You don’t have that.
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Old 08-26-2019, 11:38 AM
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Originally Posted by NotABaller
Did a search but didnt yield many results.
Did you really?

https://mbworld.org/forums/c63-amg-w...ng-2012-a.html
https://mbworld.org/forums/c63-amg-w...d-i-worry.html
https://mbworld.org/forums/c63-amg-w...-2012-c63.html
https://mbworld.org/forums/c63-amg-w...13-c63-pp.html
Old 08-26-2019, 11:40 AM
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Originally Posted by NotABaller
I dont notice any leaks on floor of place I park. How can I check for potential oil/coolant mixing?
Your dipstick would be able to tell you as much.

But I wouldn’t know, I live in Florida where I’ve never encountered such an issue with my car, but it’s normal as BLKROKT said. As long as it’s not happening frequently (ie: every week)
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Old 08-28-2019, 10:27 PM
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Originally Posted by NotABaller
I dont notice any leaks on floor of place I park. How can I check for potential oil/coolant mixing?
Your oil will be milky when you check it
Old 08-28-2019, 11:11 PM
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Originally Posted by G_Money
Your oil will be milky when you check it
His car is fine
Old 08-29-2019, 08:35 AM
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Originally Posted by BLKROKT
His car is fine
Better pull the heads just to be safe though...
Old 08-29-2019, 08:44 AM
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Originally Posted by Jasonoff
Better pull the heads just to be safe though...
And don’t forget cutting the cats apart to confirm that they’re really separate and not just one big cat.

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