Anyone know if it is possible with STAR to adjust how the dash cluster calculates MPG. I have manually recorded each milage at fill-up for 2 years of my ownership and the real MPG is 35.4MPG but the dash says something silly like 40+. It seems to be about 20% out all the time.
Adjust MPG calculation of dash - E350Cdi
- Thread starter MrGundam
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OneForTheRoad
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Strange, mine has averaged 33mpg over 3 years . The dash never ever says 40+ . Only ever time it did was when In 9th gear and a drive for around 200 miles, has it said 45 mpg.
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MrGundam
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This is what my dash says after 18093 miles. Vast majority of which is motorway driving:
But tracking fills myself shows around 35.4 Mpg:
So it seems to be out by about 13% difference.
Supernoodle
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Didn't you discover your car had an EGR delete remap? You sure that there wasn't any other tweaks done in that remap? That could put the fueling out.
ChrisEdu
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I don't want to think what my real mpg is, if I get an indicated 34.5mpg. I'm starting to think my trainers might be lead lined.
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AFAIK, no.
When I had my W212 E350CDI it consistently reported better fuel economy than reality and I asked the dealer multiple times if there were calibration parameters they could change to fix it, but they never could.
Oddly, the cluster MPG on both my W212 biturbo E63's was always within 1% or 2% of reality - with the cluster reporting higher consumption than reality.
ALFAitalia
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They never report a worse than reality MPG do they....funny that!!! 
I did a 280 mile trip a few weeks back, car reported 44MPG. A few other trips I traffic etc so below that and when I filled up, calculated the tank as having been 47MPG so it does sometimes go the other way.They never report a worse than reality MPG do they....funny that!!!
OneForTheRoad
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Reset the counter once warmed up you'll be getting 99.9 mpg for a short timeI don't want to think what my real mpg is, if I get an indicated 34.5mpg. I'm starting to think my trainers might be lead lined.
ChrisEdu
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Wahoo! If I keep resetting it as I drive, does it act like doing up, up, start, down, right, left, start, up on the PlayStation and give me unlimited fuel?Reset the counter once warmed up you'll be getting 99.9 mpg for a short time
