Can the MPG computer be calibrated for accuracy?
08-21-2007, 09:24 AM
#1
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Harley-Davidson
Can the MPG computer be calibrated for accuracy?
I just returned from a road trip, and my car says I got 28.6 mpg. This would be great news for a powerful V-8 if it were only true. When I added up the fuel receipts and divided into the miles driven, I actually got 25.4 mpg. This is an error of 12.5%.
How does the car measure the fuel flow, and can this measuring device be adjusted?
How does the car measure the fuel flow, and can this measuring device be adjusted?
08-21-2007, 03:13 PM
#3
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I've rented various cars that have some sort of MPG calculator and they're all off. I think the reason is that they aren't accurate in every single driving situation. If I had to guess in which situations its not accurate I'd think sitting at a stop, and maybe coasting.
08-21-2007, 06:41 PM
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My intown is about 5% high. AFAIK on my old C the tech could go in and put in an adjustment. When I checked with my SA I was informed that MB has severely restricted the SW access in the cars. It therefore might take one of those specials DAS laptops that the roving special techs carry. Get in good with your SA and maybe he'll let you know next time one of those comes in and then its GL.
Unless of course one of the techs on this board know how and are willing to share the neccessary steps involved.
Unless of course one of the techs on this board know how and are willing to share the neccessary steps involved.
08-22-2007, 03:37 AM
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My intown is about 5% high. AFAIK on my old C the tech could go in and put in an adjustment. When I checked with my SA I was informed that MB has severely restricted the SW access in the cars. It therefore might take one of those specials DAS laptops that the roving special techs carry. Get in good with your SA and maybe he'll let you know next time one of those comes in and then its GL.
Unless of course one of the techs on this board know how and are willing to share the neccessary steps involved.
Unless of course one of the techs on this board know how and are willing to share the neccessary steps involved.
08-22-2007, 05:13 AM
#6
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i drive a 05 c230ss and from cali to las vegas and some parts cruse control at 70 to 85 it some times say 36mpg and the car only said 32 the most but it registered 36 for like a good 2 hours but the highest is 39 mpg
08-22-2007, 06:30 AM
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08-22-2007, 10:08 AM
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You can directly set the correction value or increment or decrement it from sort keys.
I cannot believe they were unable to find this, must be that they were not willing to adapt it from the default.
