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Power steering fluid

Discussion in 'Engine' started by Nibbo, Feb 1, 2010.

  1. Nibbo

    Nibbo Hardcore MB Enthusiast

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    Hi all,

    Not really an engine thread but was not sure quite where to post so sorry administrators; please move if there is somewhere more appropriate.

    My W203 is squealing like a little piggy when I turn the steering wheel.
    Have checked the power steering fluid level and its not even registering on the little dip stick.

    Does anyone know if I just ask the local motor factor for some power steering fluid or are there different grades?
    If there are different grades what do I ask for?

    Many thanks as always,
    Nibbo
     
  2. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Get the oil from MB. Its a green colour and called Pentosin.
     
    1 person likes this.
  3. OP
    OP
    Nibbo

    Nibbo Hardcore MB Enthusiast

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    Thanks BlackC55, however I tried to contact my nearest dealer to see if they had it in stock and that it was available over the counter. It's a 30 mile round trip and haven't got the time to waste at the moment.
    As usual, no-one available... can I get them to call you sir? but no-one ever calls back. Even filled out an on-line parts enquiry, still no call back. :wallbash: Grrrr...

    Do we know for sure that they sell it to the public?
    Or, I think the grade is CHF 11S; presumably I can mix any fluid of the same grade or will this damage seals etc...

    Thanks again
     
  4. nick mercedes

    nick mercedes Hardcore MB Enthusiast

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    How desperate are you for it?

    I've got a few 1 litre tubs of it, at the very least I can get the part number them so you can get it locally.
     
  5. goldestate

    goldestate Hardcore MB Enthusiast

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    There are a number of firms that sell CHF Central Hydraulic Fluid to the required standard the S being synthetic, including Wynns, Comma, Febi and probably many more.
    Pentosin is if I remember correctly an American brand.
    If Mr M as above has some get it sent cheaper in fuel and time.
     
    Last edited: Feb 2, 2010
    1 person likes this.
  6. OP
    OP
    Nibbo

    Nibbo Hardcore MB Enthusiast

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    Thanks Nick,
    Not too desperate; let me know the Part No and I will order it from your website.
    Cheers
     
  7. Pontoneer

    Pontoneer Hardcore MB Enthusiast

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    I'd be interested to know when Mercedes stopped using ATF in the power steering pumps and went over to this different fluid ?

    I suppose I'd have to guess that it might be when they changed over from recirculating ball systems to rack & pinion ?
     
  8. panason1c

    panason1c Hardcore MB Enthusiast

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    The power steering fluid level should normally never need a top up unless the system has developed a leak.........check your system for any fluid loss, a common area for leaks is from the steering rack rubber 'boots' on the steering arms which is due to a failure of the seals behind.
     
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  9. OP
    OP
    Nibbo

    Nibbo Hardcore MB Enthusiast

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    Good shout that man...

    No sign of a leak so topped fluid up.
    10 minutes later virtually no power steering at all; looked under bonnet and fluid everywhere so topping up must have increased the pressure and caused the undetectable leak to become a complete failure.
    D'oh... managed to muscle it to a local garage who thinks it is just a seal; hope he is right.
     

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