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How do you change oil on your cclass w205 since 2014 ? drain or extract oil ?

Discussion in 'General Mercedes-Benz Related Discussion' started by benzw205, Jan 14, 2020.

  1. benzw205

    benzw205 Member

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    How do you change oil on your cclass w205 since 2014 ? drain or extract oil ?

    hello,

    it seems that the official procedure from Benz for any C-class W205 since 2014 is vacuum / extract from the top, can you confirm ?

    My feeling is that this procedure is not as good as draining, but Benz engineers cannot be totally dumb ? what do you think ?


    But still, I think that if oil has never been drained in my car, I should at least once try to go where they will drain it to change it.

    Thank you for your ideas.
     
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  2. Blobcat

    Blobcat Moderator

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    Suck these days

    Plastic sump and metal sump plug equals a tendency for the sump to crack
     
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  3. mercmancdi

    mercmancdi Senior Member

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    I agree with Benzw205 you would think it would need a drain now and then , although there may be the problem Blobcat has mentioned,,I have not drained a plastic sump or don’t know if they
    make the bung magnetic which I suppose would help . most of mine is pump out dip stick holder with an drain now and then. But it’s all metal.
     
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  4. Gazwould

    Gazwould Senior Member

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    Do one last sump drain , fit a magnetic stainless steel Gold Plug and buy a 9L extractor off the bay .
     
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  5. LostKiwi

    LostKiwi Senior Member

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    Some cars (Smarts for example) don't have sump plugs. A properly used suction pump will get as much out as draining. If you want to sure drop a litre of new oil into the sump and use it to flush out the dregs.
    My own Smart Roadster has 145k miles still on all original internals and turbo (and its not driven gently...)
     
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  6. Uncle Benz

    Uncle Benz Senior Member

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    I cracked one sump on an om651 trying to get the drain plug out back in the days when they had just started appearing in the w204. Sump is a pig of a job to change. You have to lower the subframe and support the engine from above. I suck 'em all since then.

    Some of the very new w205 have a plastic plug that you just twist out with a screwdriver and fit a new plug when done. These are not a problem at all.
     
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  7. Wighty

    Wighty Senior Member

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    Pela 6000 in operation 538D89C2-C581-4073-9CDF-D7141BB78300.jpeg
     
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  8. rf065

    rf065 Senior Member

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    Seeing as used engine oil is carcinogenic, why would you let your mechanics stand under the car and get a pint of the stuff up his arm as he undoes the sump plug? Old fashioned way of doing it and will probably be outlawed before long.
     
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  9. mioba

    mioba Senior Member

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    Gravity pulls things down believe it or not. Drain from the sump is the best esp if left overnight.
    The merc dealer near me drains.
    It may be on some cars with plastic sumps they pump, but I asked the workshop manager and he said no they only drain. You can even see the catch pans they use that can be raised to under the sump when the cars on the lift through the window into their huge garages.
     
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  10. Gazwould

    Gazwould Senior Member

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    Pan funel directly into an 208L barrel , I can see why .

    Dispersants hold impurities in suspension so no fear of not getting the dregs .

    Dregs /sludge only present if poor quality oil is used , coolant contamination or change interval was too long .
     
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  11. mioba

    mioba Senior Member

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    yes since the world is going electric
     
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  12. Blobcat

    Blobcat Moderator

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    They’ll most likely suck the electrons out in the future, don’t want them pooling around on the workshop floor :D:p:cool:
     
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  13. Painter16

    Painter16 Senior Member

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    I've decided to start having a go at changing things like air filters,and oil and filters my self ,I used to do all my own servicing on my cars years ago,and enjoyed doing it ,so things like this seem quite straight forward so why not ,
     
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  14. rf065

    rf065 Senior Member

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    There's a video on Y/Tube where a Tesla motor is dismantled, and it's full of oil.
    I know a lot of high voltage mains cables are laid in oil filled ducts to prevent overheating.
     
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  15. LostKiwi

    LostKiwi Senior Member

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    O
    Oil is a commonly used coolant for high voltage transformers and power circuits.
     
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  16. Blobcat

    Blobcat Moderator

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    You'll be wanting AMG oil in your electric car sir :rolleyes:
     
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  17. umblecumbuz

    umblecumbuz Senior Member

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    ... and drain it hot.
     
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  18. DREAMER NO2

    DREAMER NO2 Senior Member

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    If plastic sump then extraction is the best method . Lots of these pumps on ebay .I picked one up for my oil changes .At the time i had to remove my under tray .But then i purchased an 12 volt extraction pump only to find i had a square hole in the under tray that the oil went through so no need to extract it now . But i use it now and then if i am pushed for time .
     
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  19. Blobcat

    Blobcat Moderator

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    I have a Pela 6000 as per @Wighty above, I've also recently picked up a 12v electric one from Lidl so will try that next time.
     
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  20. LostKiwi

    LostKiwi Senior Member

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    Oil changes with a pump are far more civilised.
    Take car to shops to buy biscuits.
    Insert pump tube down dipstick hole and pump up vacuum.
    Go inside and make coffee.
    Come back out and drain first 6 litres into empty containers.
    Insert pump back into dipstick and pump up vacuum.
    Go inside drink coffee and munch biscuits.
    Go back out and remove pump, change filter and refill with oil.
    Simples :)
     
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