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-   Diesel Discussion (http://www.peachparts.com/shopforum/forumdisplay.php?f=15)
-   -   Scangauge II Install W210 (http://www.peachparts.com/shopforum/showthread.php?t=214737)

nhdoc 05-06-2008 06:56 AM
Quote:
Originally Posted by Biglex (Post 1845399)
I just went on a trip to Pittsburgh this weekend, and was checking the miles on the guage. It showed I averaged around 48MPG, and also showed I had about 500+ miles til empty, however my fuel gauge said otherwise. At about 600 miles on the actual odometer, she was about dry. Unfortunately I have yet to be able to get an accurate MPG reading on one of these scan gauges. I love mine, it has many many uses, I just wish MPG was one of them. :(

I'd suspect you don't have it set up correctly. You need to tell it what kind of engine, fuel and tank capacity you have before it will read right. Then you need to "tweak" it when you fillup once or twice just to calibrate it. Usually that will do it. Did you set it up following the instructions in the manual?

pimpernell 05-06-2008 10:28 AM
96 e300d here, and with my scanguage, once the initial settings are made, I find that my fill up will be within 1/2 to 1 gallon of what my scanguage says it "thinks" I used. Fantastic little tool to say the least!!

Biglex 05-07-2008 01:09 AM
I set it up with Diesel A, 3.0 liter and the capacity.

Pimpernell - what do you have programmed as the capacity of your fuel tank?

nhdoc 05-07-2008 07:01 AM
Quote:
Originally Posted by Biglex (Post 1846639)
I set it up with Diesel A, 3.0 liter and the capacity.

Pimpernell - what do you have programmed as the capacity of your fuel tank?
Did you follow the proper calibration method for entering the "fillup" amount too? It sounds like maybe that setting is way off.

Full tank capacity on these cars is about 21 gallons. I set mine to 20 to be safe.

If it is not that then I would suspect there is something wrong with either the scangauge or your OBDII computer, but I'd start with trying another scangauge (they should replace it under warranty I would think).

pimpernell 05-07-2008 09:48 AM
Quote:
Originally Posted by Biglex (Post 1846639)
I set it up with Diesel A, 3.0 liter and the capacity.

Pimpernell - what do you have programmed as the capacity of your fuel tank?
Owners manual for my 96 e300d says I have a 16.4 gallon tank, which includes the reserve, and thats what I have programmed in the scangauge.

Biglex 05-07-2008 08:20 PM
yeah I put 18 gallons in mine regularly, so I know it holds more than that. I guess I need to redo the calibration.

wbuhrman 05-10-2008 12:38 AM
Does anyone know how Scan Gauge measures mpg in a diesel vehicle? I suspect they are using MAF and VSS, but what air/fuel stoichiometric ratio are they "assuming" (14.7:1 is for gassers). What fuel density are they using and is it adjustable? Is there a Lambda correction reading available?

Thanks.
wbuhrman

TMAllison 05-10-2008 12:49 PM
Quote:
Originally Posted by Biglex (Post 1847575)
yeah I put 18 gallons in mine regularly, so I know it holds more than that. I guess I need to redo the calibration.
There were diff size tanks in the 96/97's. I thnk they got 60 and/or 70 liters. The 98/99's got 80l tanks.

Enter your vin and check yours. http://old.mbclub.ru/mb/vin/?lng=eng


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