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Classe C (W204) Temperature Gauge Swing

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Old Jul 24, 2016 | 08:48 AM
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C Class W204 220CDI
Classe C (W204) Temperature Gauge Swing

Hi everybody, I'm Antonio from Italy
the issue with my W204 is that on an uphill road higway the temperature gauge swings up to 120°

Even if in winding roads for example Amalfi coast with much traffic the temperature remains normal.

I noticed also that after a long trip the cooling fan continues running.

I can post links of the videos I made from youtube

Thank you in advance
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Old Jul 24, 2016 | 08:54 AM
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2008 C300 Sport 6 Speed Manual, 1953 Chevy Bel-Air, 2015 Audi allroad, 1963 Chevy Apache
I'm assuming you have checked the coolant level...
Has the cooling system been checked/serviced recently? Possible failing thermostat?
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Old Jul 24, 2016 | 02:42 PM
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C Class W204 220CDI
Thank you for the prompt answer, the service told me also the thermostat works.

Do you any other suggestion?
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Old Jul 25, 2016 | 08:52 AM
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2008 C300 Sport 6 Speed Manual, 1953 Chevy Bel-Air, 2015 Audi allroad, 1963 Chevy Apache
If the thermostat is opening and you still have climbing temps while the engine is under load...

Water pump is failing?

Radiator and/or coolant passages in the engine are clogged and not allowing enough coolant to pass through. Could do a "flow test" on the radiator. Is the coolant nice and clean looking? If so, I would doubt it's a clogging issue...
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Old Jul 28, 2016 | 07:50 AM
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2017 C43 AMG, 2010 C350 4Matic, 9 Motorcycles
Check ECT. It reports the temp to the ECU
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