W204 C250CDI Thermostat.

Discussion in 'Engine' started by eldar, Jan 3, 2017.

  1. eldar

    eldar New Member

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    Joined:
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    Car:
    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.
     
  2. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

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    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.
     
  3. grober

    grober MB Club Veteran

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  4. Chrishazle

    Chrishazle Hardcore MB Enthusiast

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    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.
     
  5. OP
    OP
    eldar

    eldar New Member

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

    Thanks.
     
  6. Yugguy

    Yugguy Hardcore MB Enthusiast

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    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.
     
  7. Oldlae

    Oldlae Hardcore MB Enthusiast

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    I am also having my thermostat replaced tomorrow due to the same symptoms.
    Tony
     
  8. Oldlae

    Oldlae Hardcore MB Enthusiast

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    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
     
    Last edited: Jan 5, 2017
  9. Chrishazle

    Chrishazle Hardcore MB Enthusiast

    Messages:
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    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.
     
  10. Oldlae

    Oldlae Hardcore MB Enthusiast

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    Location:
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    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
     
    Last edited: Jan 5, 2017

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