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Old 07-16-2006, 07:10 PM
Join Date: Mar 2006
Location: virginia
Posts: 12
jlboygenius is on a distinguished road
Nav version upgrade screwing with MPG?

A while back i upgraded my nav to v27. In the process, of messing around with it, I down graded and upgraded again. This put it into euro? mode, which got rid of the "yes i agree" legal BS, but i think it did more than that.

Ever since then, my gas milage has been way off, reporting like 35mpg, but when i do the math, it's closer to 29. From what I can tell, it's measuring mpg using UK gallons instead of US gallons. Does this make sense? Adjusted, the MPG is almost exacrly what i'm actually getting. Is there any way to change it back? Do i need to take it to the dealer and have it coded to the US again, and if i do, will the "I agree" BS come back?
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Old 07-16-2006, 08:47 PM
xx3's Avatar
xx3 xx3 is offline
Join Date: Nov 2005
Location: California
Posts: 1,177
xx3 is on a distinguished road
Yes you have to take it back to the dealer to get it recoded into the U.S. mode. And you are also right about your X5 being in imperial gallons.

In U.S. mode the accept screen will come back... you have our lovely lawsuits to thank for that. But with v. 27 the accept screen disappears in 8 seconds. Which means that by the time I back my X3 out of the garage, and set it in D - the accept screen is gone...
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Old 07-16-2006, 10:37 PM
Join Date: Mar 2006
Location: virginia
Posts: 12
jlboygenius is on a distinguished road
I dont want to see that screen at all. Maybe if it was only for NAV mode(like other cars), but it's for everything! I'll just trick people to thinking my car gets hybrid like mileage.
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Old 07-17-2006, 06:27 AM
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Join Date: Aug 2005
Location: Peachtee Corners, GA
Posts: 1,192
Brian-bmw is on a distinguished road
Check out this post. I fixed the MPG problem in my car by pulling the fuses for the OBC. These are E38 fuses, but try pulling the corresponding X5 fuses.

2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input
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Old 07-17-2006, 10:26 PM
Join Date: Mar 2006
Location: virginia
Posts: 12
jlboygenius is on a distinguished road
Intresting. I'll have to give that a try. I actually have an E46, so i'll have to figure out which are the right fuses. Thanks!
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