E350 estate strange MPG readings

Discussion in 'Engine' started by sjhalstead, Jan 18, 2017.

  1. sjhalstead

    sjhalstead Member

    Messages:
    49
    Joined:
    Nov 16, 2013
    Location:
    Kirkcudbright
    Car:
    E 350 Estate
    On a long trip today about 300 miles. Doing well showing 46.3 MPG but suddenly went from approx range of 230 miles to 98 miles range 96,94,88,80,75 etc fearing a fuel leak i pulled over noleak. Put 25 litres into tank all good about 250 miles then very up and down. Any ideas??
     
  2. Monkeylegend

    Monkeylegend Hardcore MB Enthusiast

    Messages:
    794
    Joined:
    May 18, 2011
    Car:
    2011 E Class 220CDi, 2004 SL350
    Did the fuel gauge drop at the same time?
     
  3. OP
    OP
    sjhalstead

    sjhalstead Member

    Messages:
    49
    Joined:
    Nov 16, 2013
    Location:
    Kirkcudbright
    Car:
    E 350 Estate
    no the fuel gage was steady and no obvious leaks or diesel smell
     
  4. tonysmb

    tonysmb Hardcore MB Enthusiast

    Messages:
    346
    Joined:
    Oct 11, 2011
    Location:
    South Devon
    Car:
    E350 CDi coupé, A150 (W169)
    Diesel or petrol. If the former, possibly regenerating the DPF? Uses more fuel for a short period of time, which might affect range calculations. Just hazarding a guess.
     
  5. OP
    OP
    sjhalstead

    sjhalstead Member

    Messages:
    49
    Joined:
    Nov 16, 2013
    Location:
    Kirkcudbright
    Car:
    E 350 Estate
    diesel started acting up after about 250 miles of mway and A roads
     

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