E550 MPG gauge inaccurate
Thread Starter
Junior Member
Joined: Feb 2016
Posts: 73
Likes: 6
From: Chicagoland
2013 C300 4Matic
E550 MPG gauge inaccurate
Hello
I've got a `16 e550 (coupe) and I've noticed (through tracking my mileage and gas consumption via a smartphone app) that the center cluster MPG gauge is off by about 2 - 2.5 mpgs
I reset it after every fill-up to full and it doesn't matter if the driving has been all highway, all city, or a mix. It is consistently off.
Does anyone else experience this?
Is there an easy fix for this or do you guys just live with it?
I've got a `16 e550 (coupe) and I've noticed (through tracking my mileage and gas consumption via a smartphone app) that the center cluster MPG gauge is off by about 2 - 2.5 mpgs
I reset it after every fill-up to full and it doesn't matter if the driving has been all highway, all city, or a mix. It is consistently off.
Does anyone else experience this?
Is there an easy fix for this or do you guys just live with it?
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2019 G70 6MT & 2022 Ford Maverick XL
I didn't realize they made 550s (coupe or sedan) for 2016.
This is off in my E350 as well - as a matter of fact, it has been consistently off in every car I've ever owned with such a feature.
You'll have to live with it.
This is off in my E350 as well - as a matter of fact, it has been consistently off in every car I've ever owned with such a feature.
You'll have to live with it.
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Joined: Apr 2006
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From: Dallas-Ft.Worth,TX
2016 E350 Sport
One might think the method to calculate this is pretty cut-and-dried, and that the manufacturers could create accurate formulas... if it wanted to...
Thread Starter
Junior Member
Joined: Feb 2016
Posts: 73
Likes: 6
From: Chicagoland
2013 C300 4Matic
Yep, regardless of car manufacturer, it is always off. Maybe it's to make the majority of American drivers -- with their 3-4 ton SUVs -- feel like their 13-14 mpgs is good (when it's actually 10-11 mpg).
One might think the method to calculate this is pretty cut-and-dried, and that the manufacturers could create accurate formulas... if it wanted to...
One might think the method to calculate this is pretty cut-and-dried, and that the manufacturers could create accurate formulas... if it wanted to...
that was the main reason i was so surprised when the E550's was so off
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Joined: Oct 2010
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
Hello
I've got a `16 e550 (coupe) and I've noticed (through tracking my mileage and gas consumption via a smartphone app) that the center cluster MPG gauge is off by about 2 - 2.5 mpgs
I reset it after every fill-up to full and it doesn't matter if the driving has been all highway, all city, or a mix. It is consistently off.
Does anyone else experience this?
Is there an easy fix for this or do you guys just live with it?
I've got a `16 e550 (coupe) and I've noticed (through tracking my mileage and gas consumption via a smartphone app) that the center cluster MPG gauge is off by about 2 - 2.5 mpgs
I reset it after every fill-up to full and it doesn't matter if the driving has been all highway, all city, or a mix. It is consistently off.
Does anyone else experience this?
Is there an easy fix for this or do you guys just live with it?
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Joined: Apr 2006
Posts: 4,694
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From: Dallas-Ft.Worth,TX
2016 E350 Sport
I do not have access to non-ethanol fuel where I live.
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2019 G70 6MT & 2022 Ford Maverick XL
I have access to non-ethanol fuel but only in 87 octane form. So I don't use it.
As said above, all of my cars have been about 10% off consistently. They've also each had their tanks where the gauge was nearly spot on. Too many variables.
As said above, all of my cars have been about 10% off consistently. They've also each had their tanks where the gauge was nearly spot on. Too many variables.
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From: V E G A S
1922 Ford Model T / no OBD
I record all my fill-ups on fuelly.com and also reset trip meter at the pump.
So looking at my record, the typical error is when the car shows. 37.9 mpg, the calculated real is 35.9
So yes 2 mpg difference it is, but that on long way cruising.
Driving in the city the error comes down to 1 mpg.
I read on other forum that you can adjust the readings, but it never bother me that much.
So looking at my record, the typical error is when the car shows. 37.9 mpg, the calculated real is 35.9
So yes 2 mpg difference it is, but that on long way cruising.
Driving in the city the error comes down to 1 mpg.
I read on other forum that you can adjust the readings, but it never bother me that much.
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From: Southern US
2010 E550, 273 Engine: 2012 S550, 278 Engine
In southern Louisiana non-ethanol is plenty available. Used to be some individual stations but now even Murphy USA has it.
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From: Dallas-Ft.Worth,TX
2016 E350 Sport
As others have noted, it's difficult to find non-ethanol in premium octane in N. Texas. I imagine I could find non-ethanol fuel here if I wanted to look. Maybe it will even be 91-octane. But I won't burn a full gallon (or more) to drive that far to get it.
Last edited by DFWdude; Apr 4, 2021 at 09:57 PM.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 9,224
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From: V E G A S
1922 Ford Model T / no OBD
google.com/maps/search/no+ethanol+gas/@32.8215611,-96.8716368,11z/data=!3m1!4b1?hl=en-US
Google is your friend. Not sure the search gained correct results, but it is a start.
Google is your friend. Not sure the search gained correct results, but it is a start.
Last edited by kajtek1; Apr 4, 2021 at 10:48 PM.
MBWorld Fanatic!
Joined: Apr 2006
Posts: 4,694
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From: Dallas-Ft.Worth,TX
2016 E350 Sport
Valero stations carry non-ethanol for Regular grade. My C320 runs on mid-grade, but in my experience, Mercedes-Benz's hate regular grade. Moving on...
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2019 G70 6MT & 2022 Ford Maverick XL
We have it here in GA.. Murphy USA has it, Valero, QuikTrip, some RaceTracs I believe.. most are 87 octane, I saw one at 88 oddly, and one at 90 octane. All below the required minimum, but I did run a tank of 90 octane non ethanol through my E350 one time. I could not tell a difference in performance or MPG whatsoever.
