GLC63s, GLC63, GLC43 AMG SUV and Coupe (X253, C253) 2015 - Present

GLC 43 2018 - overheating light comes on

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Old May 22, 2022 | 05:04 PM
  #1  
pierre52's Avatar
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Question GLC 43 2018 - overheating light comes on

My 2018 GLC 43 - 45000 miles - temp gauge is usually at 3 bars below the red. Once in a while, it goes up to the red. Not sure what causes it.
I stop for a few minutes, and usually the problem disappears.
I have noticed the radiator fan is almost always on (and noisy, the usual complaint of MB owners based on the forum), unless I go downhill or on the flat. I live in the Caribbean, on a small island with steep roads, where it is difficult to go past 40 mph. My average speed on the computer since I started using the car is only 12 mph.
Local mechanic checked the computer messages - nothing out of the ordinary.
Any comments?
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Old Jun 6, 2022 | 07:25 PM
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DNA47's Avatar
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Facelift GLC43
Originally Posted by pierre52
My 2018 GLC 43 - 45000 miles - temp gauge is usually at 3 bars below the red. Once in a while, it goes up to the red. Not sure what causes it.
I stop for a few minutes, and usually the problem disappears.
I have noticed the radiator fan is almost always on (and noisy, the usual complaint of MB owners based on the forum), unless I go downhill or on the flat. I live in the Caribbean, on a small island with steep roads, where it is difficult to go past 40 mph. My average speed on the computer since I started using the car is only 12 mph.
Local mechanic checked the computer messages - nothing out of the ordinary.
Any comments?
I had this problem on my old W205. It was the water pump.
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Old Jun 9, 2022 | 04:54 AM
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Bloom_Phaze's Avatar
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Mercedes Benz AMG GLC 63s
Yeah sounds like you definitely have a cooling issue. Could have a small hole in the rad, in one of the hoses or the water pump - which would truly suck. Were I you, I’d have a diagnosis at Your trusted dealer and or a reputable mechanic if your not so minded yourself.

If you don’t find any water on the ground, then something is obviously not leaking badly, aka the Rad, hoses or the fittings so that is one factor to tick off the list should that be the case. If you can’t see any water residue on the undertray and or surrounding parts then that should rule out any micro leaks to a degree.


Sorry if that’s no help.
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