I have now done just over 800 miles in my 325D auto. The OBC has consistently been indicating 37.1mpg. At the weekend I was able for the first time to complete a brim to brim test started two weeks earlier - 34.3 mpg actual.
8% miscalculation by the "on board computer." Some computer.
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That's accurate by VAG standards. I used my father-in-law's Golf mk4 TDI 130 for a week on the commute. I got 52 mpg brim to brim, which was excellent, but the computer was miles out, claiming 59 mpg.
To redress some of the reputation of French electronics, the computer in our Scenic is never been out by more than 2%
Cheers
DP
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