W204 C250CDI Thermostat.

eldar

New Member
Joined
Jan 3, 2017
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3
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C250CDI
Hi,
My trusty 2012 W204 C250CDI has a dodgy thermostat, I strongly suspect. Takes way too long to heat up, and then falls to 60c driven gently. Heater output is poor. I've checked the gauge, and that is fine.

So, failing thermostat. Is replacement straightforward, or requiring magic incantations a dealer must supply?

Thanks.
 

Auto-mobile

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Oct 1, 2011
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Birmingham
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2x c43 Amg clio 172 turbo 314bhp
Comes as part of a plastic housing, done a few now, more so for leaking.

Wiring harness needs to be moved out of the way and without special hose clip pliers it would be a bit of a struggle.
 

Chrishazle

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Nov 13, 2008
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Nr Ashford, Kent
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2008 S204 C220CDI Elegance Estate Auto, 2008 R171 facelift SLK280 Auto.
Have something very similar on my C220 S204, spoke to indie yesterday who will be servicing the car tomorrow, he reckons 1 1/2 hours work plus part to change the stat.
 
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eldar

New Member
Joined
Jan 3, 2017
Messages
3
Car
C250CDI
Appreciate the replies and assistance, I think a trip to the mender is in order.

Thanks.
 

Yugguy

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Apr 6, 2016
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Rugby UK
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W204 C220CDI Elegance with Comand
Is it a lot harder than the 646 thermostat, cos on a 646 although it's fiddly, it's technically quite easy, especially if you remove the oil filter to get better access.
 

Oldlae

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Mar 9, 2016
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103
Location
Merriott Somerset
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S204
Thermostat replaced. NOT by MB Dealer.
MB part cost £50,50
Coolant £6,00
Labour £25,00
+ VAT
'Proper job'
That's life in Zumerzet for you!:D
Tony
 
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Chrishazle

MB Enthusiast
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Nov 13, 2008
Messages
4,051
Location
Nr Ashford, Kent
Car
2008 S204 C220CDI Elegance Estate Auto, 2008 R171 facelift SLK280 Auto.
My indie looked the job up on his computer system, it said 1 1/2 hours, so even at his low rates that would be £75+VAT. He'll be doing the job some time in the next week or so, will see what the outcome is - although he did say the part should not be more than £20, and he uses only OEM parts.
 

Oldlae

Active Member
Joined
Mar 9, 2016
Messages
103
Location
Merriott Somerset
Car
S204
My indie looked the job up on his computer system, it said 1 1/2 hours, so even at his low rates that would be £75+VAT. He'll be doing the job some time in the next week or so, will see what the outcome is - although he did say the part should not be more than £20, and he uses only OEM parts.


My garage tried to source the Thermostat assy.(incl.plastic housing) from an Auto parts co. and was quoted +- £ 40, But they could not supply.

The part was eventually obtained from MB, which cost £ 10 more, but included a new temperature sensor, so was actually better value.
Tony
 
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