W203 Auto Gearbox Problem?

Discussion in 'Engine' started by HedleyA, Jun 29, 2011.

  1. HedleyA

    HedleyA New Member

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    C270 CDI 5door
    Hello all, you input would be much appreciated on this one.


    My 2002 W203 developed a problem that may actually have been two problems.


    1/ When accelerating hard it would reach 40mph and not change up past 3rd, i.e. go into limp home mode. Turning off and restarting put it back into normal mode.


    2/ Other times, accelerating hard from a standing start, it would get to 40 and skip into neutral (revving up and down ok but no drive to the wheels). When I coasted down to 10mph it was fine again.


    So I got it looked at and they replaced the faulty Trans Electronic Control Plates and refilled the ATF (£400 including diagnostics). The old AFT was in good condition but a little over filled.


    Since the repair I can accelerate hard in a straight line and never get either of the problems.


    But when I accelerate hard on a bend (usually to the right and uphill) it consistently goes into limp home mode. If I accelerate slowly, no problem.


    Any ideas?


    Many thanks in advance, HedleyA
     
  2. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    By limp mode do you mean it's stays in 2nd gear? Or the engine has lack of power?
     
  3. OP
    OP
    HedleyA

    HedleyA New Member

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    Hi, it stays in 2nd gear. Any ideas?
     
  4. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    The ATF level could be a little low
     
  5. OP
    OP
    HedleyA

    HedleyA New Member

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    I thought that too. When I got it replaced (see first post) it was over-full and they re-filled it to the recommended level.

    I am starting to wonder if it could be something electrical, like a loose connection.
     
  6. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

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    Maybe. It needs to go on a Star again and the level checked with the proper dipstick.
     
  7. GH421

    GH421 Active Member

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    common fault with W203's. I had the same problem. I can't remember what the exact fault is but I do remember taking my mechanics advice rather then employ his services as it would amount to a very large bill.

    He said don't drive it hard :) ..............no problems ever since.
     
  8. OP
    OP
    HedleyA

    HedleyA New Member

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    Many thanks Black55.

    Many thanks GH421, I think I will follow the same advice.
     
  9. Danny DeVito

    Danny DeVito Active Member

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    Funny but i have a problem with my gearbox when i turn right it seems to be worse too. i thought i was imagining it. I suspect my n/s wheel camber/ alignment/ tire wear is the problem causing my asr ( wheelspin cutback) to kick in. Turning of the asr (maybe yours is esp or something) stops the fault occuring. Maybe you could try something like switch the things off ?
     
  10. sspeed

    sspeed MB Enthusiast

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    Well yours definitely sounds like low gearbox fluid level to me..
    It sounds like gravity is pulling it away from the pickup point when you go around a corner.
     
  11. Danny DeVito

    Danny DeVito Active Member

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    It was 2 ltrs low, but still does it now
     
  12. Tinkerer

    Tinkerer Active Member

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    I would be curious as to where 2 ltrs of ATF went ....??
     
  13. Danny DeVito

    Danny DeVito Active Member

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    N/S driveshaft oil seal is leaking. Checked yesterday and it looks like maybe the bearing has slipped out a little maybe 5mm. Hopefullly pushing it back will help. Otherwise i cant make out if the driveshaft pops out as normal ? Anyone know ?
     

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