In Reply to: Speedometer vs. OBC avg MPH posted by Keith '88 750il on August 11, 2001 at 23:01:56:
Has anyone performed an "instantaneous" reading from the OBC for MPH. I do this by going hitting the AVG MPH button and the hitting the S/R button. I assume that the first reading that is given is an "instantaneous" reading.
Using this method at about 60 MPH, my OBC is about 7MPH different than my speedometer. I believe that the OBC is correct.
Does anyone have any experience with this? Is there a way to adjust or calibrate the speedometer?