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New member / First Mercedes Question

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by salixarbour, May 15, 2011.

  1. salixarbour

    salixarbour New Member

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    Joined:
    May 15, 2011
    Location:
    Cheshire, UK
    Your Mercedes:
    C220 cdi elegance
    Hello to all.
    I have just been to see, and test drive, my first Mercedes today!
    It was a C220 cdi Estate.
    The car seems about as genuine as you can expect, and drove beautifully.
    However, it did have a very noticable 'flat-spot' when trying to accelerate,
    particularly whilst in 2nd gear. It took far too long to reach 3000rpm, and once there, wouldn't got beyond that rpm. It was the same for all gears, but was much more pronounced in 2nd gear.
    I'm baffled by this. Could it be a limiter setting, or cruise control problem,
    or even worse, an ECU problem?
    Hopefully, someone can help to clear this one up for me. :)

    Many thanks in advance.

    Alan, in Cheshire.
     
  2. mikestrivens

    mikestrivens Senior Member

    Messages:
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    Joined:
    Nov 21, 2008
    Location:
    Stockport
    Your Mercedes:
    1995 W124 320TE, 1998 R129 SL500, 2016 Triumph Tiger 800 XCx
    I'd try another one, or ten, to see if they are the same. Sounds like a walkaway job to me.
     
  3. OP
    salixarbour

    salixarbour New Member

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    Joined:
    May 15, 2011
    Location:
    Cheshire, UK
    Your Mercedes:
    C220 cdi elegance
    Thanks, Mike.
    Very much noted, and appreciated.
    I shall keep on looking.
    Regards.
    Alan.
     
  4. television

    television Always remembered RIP

    Messages:
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    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    Welcome Alan to the forum,, that car was not OK probably needed a new MAF,
     
  5. mikestrivens

    mikestrivens Senior Member

    Messages:
    2,715
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    Joined:
    Nov 21, 2008
    Location:
    Stockport
    Your Mercedes:
    1995 W124 320TE, 1998 R129 SL500, 2016 Triumph Tiger 800 XCx
    Oh and hello and welcome !!
     
  6. OP
    salixarbour

    salixarbour New Member

    Messages:
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    Joined:
    May 15, 2011
    Location:
    Cheshire, UK
    Your Mercedes:
    C220 cdi elegance
    Thanks, Malcolm / Mike.
    After my initial posting, I searched the forum and guessed it might indeed be
    the MAF sensor, or possibly a sticking EGR valve.
    I've previously owned two other diesel cars (currently a Kangoo 1.5 DCi), and have indeed experienced the dreaded MAF problem on my first diesel car, and the EGR valve problem on my Kangoo. The AA identified the Kangoo's problem (about a year ago) and it has run beautifully ever since changing the EGR valve.

    You do wonder though why on earth modern diesel cars seem to be so vulnerable and dependent on such simple delicate components, and how a dealer has the nerve to try to sell a faulty £9000+ car?

    Thanks again for your advice.

    Regards.

    Alan.
     
  7. mikestrivens

    mikestrivens Senior Member

    Messages:
    2,715
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    Joined:
    Nov 21, 2008
    Location:
    Stockport
    Your Mercedes:
    1995 W124 320TE, 1998 R129 SL500, 2016 Triumph Tiger 800 XCx

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