poor fuel economy help
Thread Starter
Junior Member
Joined: Mar 2016
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Mercedes ML320 CDI 2006
poor fuel economy help
Hi all I run a 2006 ML320 cdi (w164) and wondered if anyone can suggest a reason for poor fuel economy?
I went on a 100 mile round trip yesterday and the trip computer was showing 27mpg at best, surely I should get better on motorway mileage?
Can anyone suggest a cause and possible fix?
Any help or advice would be much appreciated
I went on a 100 mile round trip yesterday and the trip computer was showing 27mpg at best, surely I should get better on motorway mileage?
Can anyone suggest a cause and possible fix?
Any help or advice would be much appreciated
Thread Starter
Junior Member
Joined: Mar 2016
Posts: 16
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Mercedes ML320 CDI 2006
Hi, thanks for the reply.
Sorry to be a little dumb but I don't understand your answer apart from changing the air filter, It currently runs on K&N panel filters.
What do you mean by a leak oil test?
Cheers
Stephen
Sorry to be a little dumb but I don't understand your answer apart from changing the air filter, It currently runs on K&N panel filters.
What do you mean by a leak oil test?
Cheers
Stephen
Member
Joined: Apr 2014
Posts: 105
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ML 320 CDI
Hi all I run a 2006 ML320 cdi (w164) and wondered if anyone can suggest a reason for poor fuel economy?
I went on a 100 mile round trip yesterday and the trip was showing 27mpg at best, surely I should get better on motorway mileage?
Can anyone suggest a cause and possible fix?
Any help or advice would be much appreciated
I went on a 100 mile round trip yesterday and the trip was showing 27mpg at best, surely I should get better on motorway mileage?
Can anyone suggest a cause and possible fix?
Any help or advice would be much appreciated
MBWorld Fanatic!
Joined: Jun 2006
Posts: 1,140
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From: Nova Scotia, Canada
2023 GLK250, 1987 560SL
In my opinion, that's good economy for that speed. You will notice a significant improvement, just dropping down 5mph. As we drive faster, it takes an exponential increase in power. My personal best is 33.6mpg (7L/100km) @ 62mph (100km/h), but I also have my EGR disabled.
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Thread Starter
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Mercedes ML320 CDI 2006
Did you disable the egr through the software or other means?
I would like mine disabled but don't really want it remapped to have it done, am sure I once saw a post about being able to unplug it and plug a resistor in its place...
I would like mine disabled but don't really want it remapped to have it done, am sure I once saw a post about being able to unplug it and plug a resistor in its place...
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MBWorld Fanatic!
Joined: Jun 2006
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From: Nova Scotia, Canada
2023 GLK250, 1987 560SL
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Mercedes-Benz E-class w211 220 cdi / Mercedes-Benz M-class w164 320cdi
Lads,
My MB ML W164 MY07 320cdi (Canadian) has been running at 18L/100km (city driving). From friends with the same car, I get the impression that fuel consumption should be around 13L/100km - 15L/100km (city driving), so I am a little suspicious.
Recent repairs I have done include a new turbocharger (OEM a 642 090 16 80), Air Hose Duct with Flow Mass Sensor (OEM 6420946397), DPF delete (software and hardware), engine oil (MB 229.51, 5W30), and filters (cabin, air, oil, and fuel). Prior to these repairs, the car had a clogged DPF, which led to a compromised turbocharger and constant limp/home mode.
Since these repairs, the car is no longer in limp/home mode and runs smoothly, but the fuel consumption hasn't decreased. So my question is: what could be the culprit?
Any assistance is highly appreciated.
My MB ML W164 MY07 320cdi (Canadian) has been running at 18L/100km (city driving). From friends with the same car, I get the impression that fuel consumption should be around 13L/100km - 15L/100km (city driving), so I am a little suspicious.
Recent repairs I have done include a new turbocharger (OEM a 642 090 16 80), Air Hose Duct with Flow Mass Sensor (OEM 6420946397), DPF delete (software and hardware), engine oil (MB 229.51, 5W30), and filters (cabin, air, oil, and fuel). Prior to these repairs, the car had a clogged DPF, which led to a compromised turbocharger and constant limp/home mode.
Since these repairs, the car is no longer in limp/home mode and runs smoothly, but the fuel consumption hasn't decreased. So my question is: what could be the culprit?
Any assistance is highly appreciated.
