I'm having doubts about some things regarding the OBC. Can anyone who has it stock in there cars confirm this issue. Set the OBC to MPH, and see if it tracks the MPH through different speeds. Then tell me if it reads zero when you are at a stop. Does it read accurately within a few % at all speeds?
Mine reads correct when driving between 30-70MPH. When I stop, it still says like 27MPH.
My concern is that the MPG is calculated from the MPH of the OBC, and it could be getting bad information.
In the Bentley Manual, the OBC, Wiper control and Cruise Control all get speed info from the same point off the gauge cluster. They all need speed to work correctly. I'm not convinced that the OBC is getting it's MPH info from the correct point. Maybe I need to recheck that wire. __________________ 
1998 (July) 318ti, 5-spd
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