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w203 C320cdi 722.9 transmission problems

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by Jonathanc250, Nov 8, 2019.

  1. Jonathanc250

    Jonathanc250 Senior Member

    Messages:
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    Joined:
    Sep 17, 2010
    Location:
    Leigh on Sea Essex
    Your Mercedes:
    2005 W203 C320 CDI
    Evening all,

    I've been having problems with the gearbox on my car for a while now, however I will start from the top and hopefully you'll be able to see where I'm at now.

    Originally the gearbox was playing up, loosing drive, limp mode etc..
    This was down to a faulty speed sensor on the conductor plate, which I removed and sent off to ecu testing to be repaired.
    Once I got the conductor plate back, I reinstalled it to the gearbox, with a new filter and fluid.
    I Cleared the codes and went for a drive, the gearbox was back to normal. (When I say normal, I mean it wasn't going into limp mode, or getting stuck in gear or loosing drive anymore)

    Then the turbo actuator decided to stop working, so I got another one of them and fitted it, now the car was driving pretty well, lots of power, still however the gearchanges were a bit off.

    From doing alot of reading, I found that the problems I was experiencing could be from not resetting the gearbox and then doing an adaptation, after getting the conductor plate repaired.
    So I used my diagnostic computer, a Delphi Ds150e I think it is, and proceeded to reset the transmission and torque converter adaptations. Then I tried to set the torque converter lock up adaptation.

    This is where the problems began , since doing this, the car now feels like its slipping the transmission quite a bit, and when driving steady at anywhere between 40 and 70, if the revs sit at around 12-1500 for a few seconds the car then starts bumping 3 or 4 times in quick succession, which I'm assuming is the torque converter trying to engage.
    I'm also getting a noise that sounds like turbo flutter, when the car slips and then changes gear, I'm not sure if this is the torque converter making this noise or not.

    Anyway, by trying to get rid of one problem, I've created another! From further reading, it appears there is a software update for the gearbox, that addresses the problems I was experiencing (Changing down to 1st while still moving slowly, harsh 1-2 and 2-3 shifts)

    Can anyone please help me get this sorted, I have the car booked in with Mercedes, but when I Said to them I would like the gearbox software updated and the torque converter lock up re-calibrated, I was initially told there is not an update available and the need to do a diagnosis first before they can say if there is an update, or re-calibrate anything @ £176 per hour!

    If anyone can shed any light or knows anyone who would be able to help in the Essex area I would really appreciate it

    Thanks in advance, and sorry for the long post!
     
  2. Larkone

    Larkone Senior Member

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    370
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    206
    Joined:
    Aug 19, 2016
    Location:
    NW Essex
    Your Mercedes:
    CLS 320CDI 2008
    See post on the other side re indy
     
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  3. bembo449

    bembo449 Senior Member

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    Joined:
    Jan 2, 2012
    Location:
    gainsborough , lincolnshire
    Your Mercedes:
    Mercedes Cl500, land rover discovery 3 , insignia vxr , shitron dispatch
    find a decent indy in your area pal
     
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  4. Wighty

    Wighty Senior Member

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    Joined:
    Aug 4, 2016
    Location:
    Sunny Essex
    Your Mercedes:
    W211/E320cdi/2009 and CLK200k 2009
    Take a drive out to Stowmarket to see Alex Crow (MB Independent )
     
    Jonathanc250 likes this.
  5. OP
    Jonathanc250

    Jonathanc250 Senior Member

    Messages:
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    Joined:
    Sep 17, 2010
    Location:
    Leigh on Sea Essex
    Your Mercedes:
    2005 W203 C320 CDI
    Thanks for the reply’s guys, I have actually used Alex in the past, he done the fluid and filter change on my old 202 C250 and got a couple of broken glow plugs out too. I did call him last week I think it was, and unfortunately he told me it’s stealer only! The phone line was terrible though and I couldn’t hear what he was saying exactly, but I got the part where he said it was dealer only!
     
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  6. OP
    Jonathanc250

    Jonathanc250 Senior Member

    Messages:
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    Joined:
    Sep 17, 2010
    Location:
    Leigh on Sea Essex
    Your Mercedes:
    2005 W203 C320 CDI
    Does anyone happen to know if this software update actually exists for the early 722.9 gearboxes, and if you have had it done to your car, did it make a difference ?
     
  7. Kostadin Metodiev

    Kostadin Metodiev New Member

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    Joined:
    May 10, 2020
    Your Mercedes:
    W211 e280 3.0 cdi 190hp 7g tronic
    Hi,

    Did you manage to solve your problem?
    I did the same thing as you did/resetted the adaptation of the torque converter using Delphi ds150e/ trying to solve a little bit hard shifting from 2nd to 1st gear. Now I have an issue with hard shifting at almost each gear and extremely hard shifting from 1st to 2nd and 2nd to 3rd gear/something that i have never had before the adaptation reset that i performed/.

    Your help will be much appreciated.
    Regard,
    Kosta
     
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  8. OP
    Jonathanc250

    Jonathanc250 Senior Member

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    Joined:
    Sep 17, 2010
    Location:
    Leigh on Sea Essex
    Your Mercedes:
    2005 W203 C320 CDI
    Hi Kosta ,

    I did get it sorted eventually yes, the problem I was experiencing initially was not actually the gearbox, but I created one, by resetting it!! However with regards to the adaptations I took the car to the Mercedes Dealer and they carried out an Adaptation while driving the car. If you have a dealer local to you or a good independent garage with star, I think that would be your best bet.

    Good luck
     
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  9. Kostadin Metodiev

    Kostadin Metodiev New Member

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    Joined:
    May 10, 2020
    Your Mercedes:
    W211 e280 3.0 cdi 190hp 7g tronic
    Hi, Jon! Thank you very much for the prompt reply!
    This is what i think too - manual adaptatin is needed as i did the same as you did with Delphi ds150.
    Actually i went to the official MB dealer and they did nothing, unfortunately. They just took the car and the other day told me that they did manual adaptation but with no success. However, i think that they did nothing, maybe just resetting again the adaptatins.

    I have booked a diagnostic and manual adaptatin in an indipendant garage, as you proposed. Hope this guys will sort out the problem. I will write back in few days.

    Thanks again.
     
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  10. Kostadin Metodiev

    Kostadin Metodiev New Member

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    May 10, 2020
    Your Mercedes:
    W211 e280 3.0 cdi 190hp 7g tronic
    Hi guys,

    Few days ago i found a guy who has StarDiagnosis. He adapted manually the transmition as per the instructions in Star but unfortunately with no success.

    He told me that most probably i have a mechanical problem/i was told the same in the official MB dealer after they tried to adapt the transmition/. However, I just cant believe this since i had no issues/except 3-2hard shifting/ before resetting the adaptation of the torque converter myself.

    Do you have any other suggestions and/or recommendations?

    Thanks in advance!
    Kosta
     
  11. Wighty

    Wighty Senior Member

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    Joined:
    Aug 4, 2016
    Location:
    Sunny Essex
    Your Mercedes:
    W211/E320cdi/2009 and CLK200k 2009
    When was your last gearbox oil and filter change ? What mileage has the car now ?
     
  12. Kostadin Metodiev

    Kostadin Metodiev New Member

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    Joined:
    May 10, 2020
    Your Mercedes:
    W211 e280 3.0 cdi 190hp 7g tronic
    Hi,

    Oil and filter were changed 10k kilometers ago using original ones.
    The miloeage ijs about 190k.

    Thanks
     

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