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Fuel Saver Recommendations!

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by EddieHarrald, Jan 10, 2019.

  1. EddieHarrald

    EddieHarrald Member

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    Your Mercedes:
    Mercedes E320cdi
    Hi All, Being The proud owner of a W211 E320cdi Cdi Avantguarde, I absolutely love the car, apart from the Fuel Economy! Only about 22/23 Locally,and 28/29 On a run!
    I have been tempted to try one of the Advertised Fuel Savers, That you plug in to the OBD port, but have varying reports of their worth!
    Has anybody tried one on this model? And did it work for you??
    If not, has anyone got any fuel saving Tips!
    Thankyou
    Eddie
     
  2. Blobcat

    Blobcat Moderator

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    Your Mercedes:
    R171 SLK280 3.0, Land Rover 110 County SW
    Hello and welcome,

    I used to average well over 36mpg for 100k Miles in my W211 E320 so yours isn’t working correctly. I wouldn’t be plugging any snake oil into the OBD port. Check your tyres are pumped up correctly first off and stop braking. No idea on where or how you’re driving but that will be as big a way to improve your fuel economy as anything.

    I’m assuming your car is maintained.
     
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  3. bembo449

    bembo449 Senior Member

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    Your Mercedes:
    w221 320cdi , r170 23k , range rover vogue , insignia vxr , shitron dispatch
    that's very low for a 320cdi , I get 30+ out of my 221 with the same engine with no trouble at all , have you actually worked it out or are you going off the trip comp ?
     
  4. Craiglxviii

    Craiglxviii Senior Member

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    Your Mercedes:
    W215 CL500 Motorway Queen; W251 R320L Familybenz, S211 E320 Avg Designo Edition now sadly missed.
    That’s about what I got out of our 320CDI...
     
  5. Smeagol

    Smeagol Senior Member

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    Your Mercedes:
    2009 E280 CDI
    AS others have said, I think you have a problem. I have the same vehicle and have averaged over 35 mpg over 70k miles. Maybe down in the mid 20's if mainly local driving but up to 44 mpg when on a 400 mile plus journey.
     
  6. Gazwould

    Gazwould Senior Member

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  7. Botus

    Botus Senior Member

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    27 round town and 39 on a run is a very good set of numbers for a 2006 car

    if you drive over 80 I saw a clear drop of 3 to 4 mpg,

    I can see trying to enjoy using it 25 and 34 would be normal
     
  8. malcolm210

    malcolm210 Senior Member

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    All relative really down to outside temperature, traffic conditions, distance travelled and how you like to drive it. If you do a 10 mile run on A roads I would expect your car to return circa 35mpg if it doesn’t there is a problem
     
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  9. Wighty

    Wighty Senior Member

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    Your Mercedes:
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    I get early 40's on a 300 mile run on my facelift E320cdi . I would say if the car is warm and you are on the motorway on cruise control at 70mph and you reset the fuel consumption readout you should be getting about 45mpg .
    If not I'd say something wrong as well .
    If I zeroed my readout in some of the long 50mph zones on the M1/M6 at the moment I would show late 50's (on cruise control)
     
  10. OP
    EddieHarrald

    EddieHarrald Member

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    Yes it is well maintained, and I have only had this one for just over twelve months. Previously I had a 320cdi. W210 Which was much better on Fuel!
     
  11. OP
    EddieHarrald

    EddieHarrald Member

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    Thankyou!
     
  12. OP
    EddieHarrald

    EddieHarrald Member

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    Thankyou Malcolm! It is a lovely car, in immaculate, Pristine condition, and I am certainly not a TearArse Driver, But would love a few more MPG’s!
    My son has a BMW with the same size engine, and he gets 42 MPG Locally, and 48/52 on a run, but I still prefer my Mercedes!!
     
  13. Craiglxviii

    Craiglxviii Senior Member

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    Your Mercedes:
    W215 CL500 Motorway Queen; W251 R320L Familybenz, S211 E320 Avg Designo Edition now sadly missed.
    That was the IL6 which was significant lower power than the V6 you have now...
     
  14. OP
    EddieHarrald

    EddieHarrald Member

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    No! It is a 2003 Model with an In-line 6 Engine!
     
  15. malcolm210

    malcolm210 Senior Member

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    Short local journeys with my IL6 210 gives 25mpg, show it an average of 50mph over 100 miles and it returns 45+ measured brim to brim, once you get the old lump moving it is surprisingly economical.

    My 210 is fitted with the OM613 EU3 engine whereas you’re running the OM648 EU4 engine fitted to the 211 which is slightly higher rated at 204bhp compared to 197bhp in mine so nothing in it power wise.

    If your car is high mileage even though well maintained it might be suffering from worn injectors leading to overfuelling but if it’s running ok I’d leave it any attempt to look into the fuelling side of things could rack up a large bill, refurbed injectors alone £900
     
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  16. AnthonyUK

    AnthonyUK Senior Member

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    C240 estate 2002
    There is no way those OBD2 devices will do anything to improve fuel efficiency. Please don't bother.
     
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  17. OP
    EddieHarrald

    EddieHarrald Member

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    Only done 84000 At the Moment Malcolm!
     
  18. Gazwould

    Gazwould Senior Member

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    EddieHarrald likes this.
  19. AnthonyUK

    AnthonyUK Senior Member

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  20. Gazwould

    Gazwould Senior Member

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    How does this crap even get to be marketed on Amazon and ebay !
     

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