E320 CDi W210 sooty exhaust

Discussion in 'Engine' started by Andrew Moorey, Apr 10, 2013.

  1. Andrew Moorey

    Andrew Moorey New Member

    Messages:
    7
    Joined:
    Mar 13, 2008
    Location:
    Horsham, West Sussex
    Car:
    W210 E320 CDI
    Recently noticed that after a run the bumper adjacent to the exhaust is getting sooty. Fuel economy is still fine averaging 42 over the last 1000 miles. Currently on 80k miles its never run on supermarket fuel and had its oil changed every 3k.
    I'm suspecting EGR valve but before I pull it all apart I wondered if anyone else has had this fault with a difinitive result?
     
  2. BlackC55

    BlackC55 Authorised Forum Sponsor Authorised Forum Sponsor

    Messages:
    18,922
    Joined:
    Feb 8, 2007
    Location:
    Portsmouth, Hampshire.
    Car:
    E55K SL500 E300Hybrid E250X3 Viano C55 E450Cab A180 Smart 44 Brabus
    Give it a good red line up the road a few times to see if the smoke clears.
     
  3. OP
    OP
    Andrew Moorey

    Andrew Moorey New Member

    Messages:
    7
    Joined:
    Mar 13, 2008
    Location:
    Horsham, West Sussex
    Car:
    W210 E320 CDI
    Gets that regular like!
    No fault codes logged and data logging all looks normal. Noticed that if I operate the EGR valve with a Mityvac, the vacuum builds slowly then the valve seems to jump as if the valve was sticking slightly?
     

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