CEL P0128 Question
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From: Toronto, ON
2012 C300 Sport 4MATIC (current) 2006 C280 Elegance 4MATIC (sold)
CEL P0128 Question
I know this topic has been discussed a million times on multiple MB forums but there's one issue I can't seem to find any information on. The engine ran somewhat cool all winter long (around 80c according to the dial) and the CEL came on today and when I plugged my cheapo Innova scanner it showed P0128. I've located Wahler thermostats on various parts sites but they're all 100c thermostats.
Could somebody confirm if that's the correct part or should I keep looking for a 90c thermostat. Could somebody please direct me towards a 90c thermostat online?
Also, the mods can delete this post once the proper information has been had since there's tons of posts on this subject.
Thank you for your time!
Could somebody confirm if that's the correct part or should I keep looking for a 90c thermostat. Could somebody please direct me towards a 90c thermostat online?
Also, the mods can delete this post once the proper information has been had since there's tons of posts on this subject.
Thank you for your time!
Thread Starter
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Joined: Aug 2013
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From: Toronto, ON
2012 C300 Sport 4MATIC (current) 2006 C280 Elegance 4MATIC (sold)
Also, can I use Zerex G05 at Wal Mart to replenish what coolant is lost when I change out the thermostat or should I go for the stuff at the MB Dealership which is 1/2 jug of water for $30?
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2003 C230K Coupe Orion Blue
All info is here.
https://mbworld.org/forums/c-class-w...sor-tstat.html
The only version available now is 90C, and the part # is now 271-203-05-75.
**update** Sorry, I thought you had a M271 (2003-2005). Didn't realize you have a 2006, which has a M272 engine. Not compatible. My bad.
https://mbworld.org/forums/c-class-w...sor-tstat.html
The only version available now is 90C, and the part # is now 271-203-05-75.
**update** Sorry, I thought you had a M271 (2003-2005). Didn't realize you have a 2006, which has a M272 engine. Not compatible. My bad.
Last edited by slammer111; Mar 30, 2014 at 03:00 AM.
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late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
You have two different types of thermostat fitted to Benz. On older engines M111, M271, M112 & M113 are conventional 90 degree thermostats. On M272 & M273 onward you have the so called "100 degree" 3 plate, 4 way, electronic thermostat that controls temperature between 85 & 100 degrees C & costs considerably more.
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From: Toronto, ON
2012 C300 Sport 4MATIC (current) 2006 C280 Elegance 4MATIC (sold)
Ohh so would this Wahler (first on on the page) unit be the correct one?
http://www.partsgeek.com/catalog/200...hermostat.html
Also, will the engine run at the normal 85c or so with this thermostat installed? Also, since the temperature is now above 0c here the engine is now operating at the correct but since the CEL came back on after turning it off I guess I should still change it.
http://www.partsgeek.com/catalog/200...hermostat.html
Also, will the engine run at the normal 85c or so with this thermostat installed? Also, since the temperature is now above 0c here the engine is now operating at the correct but since the CEL came back on after turning it off I guess I should still change it.
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Thread Starter
Senior Member
Joined: Aug 2013
Posts: 283
Likes: 2
From: Toronto, ON
2012 C300 Sport 4MATIC (current) 2006 C280 Elegance 4MATIC (sold)
All info is here.
https://mbworld.org/forums/c-class-w...sor-tstat.html
The only version available now is 90C, and the part # is now 271-203-05-75.
https://mbworld.org/forums/c-class-w...sor-tstat.html
The only version available now is 90C, and the part # is now 271-203-05-75.
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Thread Starter
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From: Toronto, ON
2012 C300 Sport 4MATIC (current) 2006 C280 Elegance 4MATIC (sold)
So I can install a 100c thermostat and the engine will run at the normal temperature that it did from the factory right? Just need to know this and I'll order one. This looks to be a pretty easy DIY since there's good space to work in with the V6 motor.
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Yes. You can install the electronic thermostat. Just remember to connect it to the ECU. The darn things are expensive.
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From: Toronto, ON
2012 C300 Sport 4MATIC (current) 2006 C280 Elegance 4MATIC (sold)
Oh ok thanks. I'll go ahead and place the order. I remember changing the thermostat on my Mom's Mazda Protege a few years ago and if memory serves correct the price for the thermostat was $11 and a jug of Prestone coolant was $9 but for the Benz it'll be around $100 for the thermostat shipped and $17 for a bottle of Zerex G05. Oh well once I do this I won't have to worry about this again.
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2012 C300 Sport 4MATIC (current) 2006 C280 Elegance 4MATIC (sold)
Haha yeah but I reckon it'll be easier to replace on this car than it would be on a BMW because a BMW has a ton of cheap plastic cooling pipes under the hood. For the Benz it's right next to the oil cooler housing.
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From: Toronto, ON
2012 C300 Sport 4MATIC (current) 2006 C280 Elegance 4MATIC (sold)
Alright so I went ahead and placed an order but just for the heck of it I decided to check what type of coolant my car has. It has the pinkish/peach type coolant. Is that Zerex G05? I know of MB blue coolant but not of a pink type which is in my car.
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From: Toronto, ON
2012 C300 Sport 4MATIC (current) 2006 C280 Elegance 4MATIC (sold)
Also, is it possible the temperature sensor has gone bad too? What if the temperature sensor were to fail and the engine was overheating but it's showing normal on the needle is there some sort of backup warning? I mean I can smell if an engine is running too hot as I have with other cars so I know mine is running properly but if the temp sensor kicks the bucket what happens after that?
