W203 ATF Change by MB main Dealer

Discussion in 'Engine' started by fatdazza, Oct 29, 2011.

  1. fatdazza

    fatdazza Hardcore MB Enthusiast

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    Yesterday had the ATF changed on my 2005 W203 by my local MB main dealer.

    On the receipt it itemises the filter, gasket etc. and 4 units (presume litres) of ATF fluid. I understand the auto gearbox holds 7 litres, but I think the torque converter holds 3 litres, which is not normally removed when the sump is drained.

    Can someone advise if they should have drained the torque converter and thus replaced all 7 litres?

    I am suspicious as they changed the air filter "for free" saying it was "very black", well I changed it 10 months ago (4,000 miles) so I doubt it was bad (will check tomorrow to see if they actually did change it).

    Thanks
     
  2. trapperjohn

    trapperjohn MB Club Veteran

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    I think you will find all main dealers do not train the TC. just the gearbox. Which means your nice new fluid is now mixed with what was left in the TC.
    Not sure if they "should" drain the TC as I don't know what their service schedule demands.
    Ian Walker, Olly or another of our resident service specialists will be along soon to advise.
    I know for a fact Ian drains the TC and the gearbox when performing an ATF change. As he says "No point in contaminating new ATF with old"
     
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  3. Puggy

    Puggy New Member

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    Took mine to a gearbox specialist who offered a "megaflush" service which would flush out all of the old fluid before refilling for £180.00. No noticeable difference afterwards, but thats not why I did it. My intentions were to prevent future problems
     
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  4. steve333

    steve333 Hardcore MB Enthusiast

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    Afaik mb dealers only replace whats in the gearbox & not the t/c(unless you ask at an additional cost),When my car is due (37,500)i will ask ollie at pcs to do it as others on here have had theres done by him in the past & he is very reasonable on price & drains/refils the t/c on a gearbox atf service.
     
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  5. horgantrevor

    horgantrevor Hardcore MB Enthusiast

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    as a code of practice i would change all fluid 7.5 or so liter of ATF

    and filter and new auto box gasket and clean the sump to remove any dirt particles

    also a quick flush

    then top the system off with new fluid

    other wise is a half ass job which looks like what the main dealer did if he spent the time changing the oil like you asked and not playing with the air filter you would be better off

    how do you know he did change the oil have you dipped it to see the quality

    i better stop i just hate a half ass job being done and the owner being charged for a service he did not get
     
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  6. compress ignite

    compress ignite Hardcore MB Enthusiast

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    "Flush" or "MegaFlush", as it's been termed here

    BAD,BAD,BAD !

    Forcing ATF BACKWARDS through the Transmission Guarantees FUTURE Problems!

    Think of it as someone Pressurizing your "Nether Regions" and Proclaiming that
    you'd been Proactively Cured of future "Gaseous Emissions"!!!


    CORRECT Operation:
    Drain Transmission Sump Pan and Torque Converter,replace the Two Metal "seals" on both Drain Bolts.Replace the Transmission Filter with a New One.
    Torque the Pans Bolts (AND THE DRAIN BOLTS) to Specifications.
    ReFill and check Level ,when warm.

    Drive On.
     
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  7. 230K

    230K Hardcore MB Enthusiast

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    The problem is that the OP's gearbox will most likely not have a TC drain plug, hence the need to flush through.

    230K
     
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  8. 230K

    230K Hardcore MB Enthusiast

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    Are you sure the filter they changed for free isn't the gearbox filter???


    230K
     
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  9. jaymanek

    jaymanek Authorised Forum Sponsor Authorised Forum Sponsor

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    Bad bad bad


    INCORRECT im afraid... no drain plug...

    See Olly's How To for one of the correct methods.
     
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  10. OP
    OP
    fatdazza

    fatdazza Hardcore MB Enthusiast

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    Definitely air filter. Says so on the invoice. Also when I told the service manager that I had recently changed the air filter he aksed if I was sure that the air filter housing had sealed correctly when I refitted it.

    They key point I am trying to get answered is "Is it official MB policy to only change 4 litres of ATF for this job" If so I will accept it (agreeing with everyone who says that the ATF in the torque converter should be changed in an ideal world). If it is not the official MB way, then I need to get back to the service dept and raise some merry hell because I have paid for something I have not received. Does anyone have access to WIS who can check this?

    Thanks
     
  11. mr. shr

    mr. shr Hardcore MB Enthusiast

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    My indy has just quoted me for doing ATF change but only states 4 ltrs will be used. (This is for a 211 petrol).

    I assume there isn't a drain plug for the TC on 211s either then?
    In which case, as the OP asks, is it normal for ATF change on these cars to only be 4 ltrs from the box itself or should they be doing the full 7 litre change?
     
  12. compress ignite

    compress ignite Hardcore MB Enthusiast

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    Dinosaurs have No Memory to "20/20 Hindsight" with

    "What,those Idjets in Stuttgart are using T.C.s with No Drain on the W211s ?"

    "News to Me" (?) [Actually the Chassis is Too New to me Also.]

    Sounds like "Detroit Iron".

    Ah Well then, change the ATF the way I do on the Ford:
    1.Suck ALL the ATF out of the Pan through the Tranny Dipstick Tube.
    [If there's no Tranny Drain Pan Bolt...So you don't take a bath in ATF
    replacing the Tranny Filter]
    2.Replace the Filter and ReTorque the Pan to Specs.
    3.Fill the Tranny with fresh ATF and check when warm.
    4.RePeat #1+3 Twice more [Thinning out the Old with the New]

    Or

    If there's NO Drain Bolt and No Dipstick Tube:

    1a.Drop the Pan...Drill It and have a Nut Braised inside it of the Appropriate
    mm To allow installation of a Drain Bolt for future use.
    2a.Follow #s 2,3.
    3a.Drain the ATF using your new Drain Bolt,Refill,Check and Drain Twice More.
     
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  13. clever dicky

    clever dicky Hardcore MB Enthusiast

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    I did mine last year using Ollys method. Did the drain and replaced gasket and bush housing seal. Then fill as per, disconnect hose and then pump out remainder from TC. refill the remainder. Very easy.

    Makes me wonder why people insist on buying used cars with an MB service history.
    Thankfully mine hasnt got any :)
     
  14. Alex Crow

    Alex Crow Hardcore MB Enthusiast

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    This issue does niggle me.

    I am very often asked for a price to replace transmission fluid and filter on 722.6 gearboxes, and sometimes on the 722.9 as well.
    When I quote for the work I usually explain what is involved to replace all the fluid, and why.
    I also suggest that a main dealer quote for seemingly the same job is not comparable - like many here I personally know mechanics in the main dealers workshops, and know for a fact that the standard procedure is to just replace the fluid in the gearbox sump.

    Sadly my careful explanations often fall on deaf or uncomprehending ears; most people just want to use their cars without having to understand how they are serviced!
     
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  15. mr. shr

    mr. shr Hardcore MB Enthusiast

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    Olly's How To is on a 210.
    Are you saying the same method can be applied to 203s and 211s ?
     
    Last edited: Nov 7, 2011
  16. Justin1600

    Justin1600 Hardcore MB Enthusiast

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    You cannot change the oil in the Torque converter as there is NO drain plug. Mercedes done away with them in approx 1999/2000. So the dealer has done nothing wrong.

    The only thing you can do if the oil is still dirty is to drain the oil from the sump again in a couple of thousand miles and top up with approx 3 Ltrs of fresh oil.
     
  17. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    I saw a 2003 car a few weeks ago with a TC drain bung. It surprised me too!

    I have seen a few now as I have been looking. Very strange.

    It is possible to flush the TC without a drain bung. See my "how to"
     
  18. Justin1600

    Justin1600 Hardcore MB Enthusiast

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    Very strange mate :eek:
     
  19. 230K

    230K Hardcore MB Enthusiast

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  20. mr. shr

    mr. shr Hardcore MB Enthusiast

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    I was speaking to an indy today and be said that cars fitted with a replacement or refurbished TC often have a bung so you can do a full drain.

    Could the 2003 car you saw been a victim of the Valeao rad syndrome and consequently had a refurbed TC fitted? Just a thought?
     

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