My M6 is off too....about 5 MPH when at 75MPH, and it gets worst the faster I go.

Estimated error at top speed (150+ MPH).....about 10 MPH, not sure why a great car like BMW can't get the speedo's correct??...


The OBC reads it fairly close to accurate so when in doubt push the AVG MPH button with the cruise control set where you want it and hit the reset button and you'll get the exact MPH.

Mark in AZ
1987 535is
1988 M6 - "CONAN"

• Speedometer adjustment? (nt) - resabed01 2005-09-27 19:48:25 (540 views)
  • Re: Speedometer adjustment? - resabed01 2005-09-27 20:20:51 (543 views)
    • Re: Speedometer adjustment ....get used to it... - eurowannabe535is 2006-02-18 11:30:49 (320 views)
      • Re: Speedometer adjustment ....get used to it... - resabed01 2006-02-18 18:15:32 (294 views)
    • Re: Speedometer adjustment? - resabed01 2005-10-03 22:14:03 (506 views)
    • your e24 - kjkumar 2005-09-28 01:39:42 (469 views)
      • More on the steering box fix (long) - resabed01 2005-09-30 00:29:06 (722 views)
        • Re: More on the steering box fix (long) - kjkumar 2005-10-04 13:43:53 (411 views)
        • How I fixed my subframe (pic) - euro635gas 2005-10-01 00:33:44 (618 views)
        • Nice Write-up, we really like that stuff here. (nt) - kff 2005-09-30 19:12:49 (374 views)
    • To learn about the functions of the OBC, go to (url) - kff 2005-09-27 21:49:51 (596 views)
      • Re: OBC functions - resabed01 2005-09-30 00:34:51 (480 views)
        • push in on the end of the turn signal stalk to cycle through the OBC. (nt) - kff 2005-10-03 19:44:41 (467 views)
          • Re: push in on the end of the turn signal stalk to cycle through the OBC. - resabed01 2005-10-03 21:54:44 (441 views)
        • Trevor you can still use the OBC while driving...> - kff 2005-09-30 19:07:24 (456 views)