Running cool 65-70c
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2010 c300
Running cool 65-70c
I live in Arizona and ever since it has cooled off my 2010 c300 has been running cool @60- 70 c.. take awhile to come up to these temps and does not reach 80c. got a 0128 code.. possible bad thermostat? Stuck partially open? Fluid level is ok ,fan is not running ....thoughts.
Last edited by Jay Stivers; Dec 27, 2015 at 10:46 AM. Reason: added info
MBWorld Fanatic!
Joined: Mar 2008
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From: 1 hours drive north of Sydney Australia
2007 W204 220CDI Classic Sedan
I live in Arizona and ever since it has cooled off my 2010 c300 has been running cool @60- 70 c.. take awhile to come up to these temps and does not reach 80c. got a 0128 code.. possible bad thermostat? Stuck partially open? Fluid level is ok ,fan is not running ....thoughts.
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Joined: Mar 2015
Posts: 131
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2010 Mercedes c250 4matic
I live in Arizona and ever since it has cooled off my 2010 c300 has been running cool @60- 70 c.. take awhile to come up to these temps and does not reach 80c. got a 0128 code.. possible bad thermostat? Stuck partially open? Fluid level is ok ,fan is not running ....thoughts.
It is the thermostat stuck open I had this same issue last winter also , it gets stuck open sometimes in the cold days , it's doing it to me this winter also . I got the code once so far this winter but I'm not gonna bother changing it yet because it's not
A big problem it goes away once it warms up out. And the car engine light stays on even if the thermostat functions normally after it throws a fault code once .
Junior Member
Joined: Feb 2011
Posts: 22
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From: Southern Maine
2008 C300 Sport 6spd man.
It is the thermostat stuck open I had this same issue last winter also , it gets stuck open sometimes in the cold days , it's doing it to me this winter also . I got the code once so far this winter but I'm not gonna bother changing it yet because it's not
A big problem it goes away once it warms up out. And the car engine light stays on even if the thermostat functions normally after it throws a fault code once .
A big problem it goes away once it warms up out. And the car engine light stays on even if the thermostat functions normally after it throws a fault code once .
Thermostats are there for a reason! Running an engine cold can cause numerous problems, not the least of which is corrosion on the cylinder walls. Replace your thermostat - it's not a big deal or expense!
Super Member
Joined: Sep 2015
Posts: 848
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From: Milwaukee, WI USA
2012 C300 4Matic
I agree. Best to correct issues when they are minor before they cause bigger more expensive problems down the road. This one seems like a no brainer. It is cheap and you have the advantage that can do it at your leisure.
