Hmm, most people who have their E36's don't know about this little trick... it ain't exactly useful to me in any way, except you get to see the speedometer at 140 :P It's some diagnostic test, not sure what the use is of it. I think it helps display your VIN number or something...
1) Turn off engine
2) push the trip odometer reset button and hold it
3) turn on the ignition to start up the electrical components (position 1)
4) let go of the button and watch the instrument panel, it'll show a few things
How do you think I got my avatar with the speedometer being so high? heh, not in my 318i.
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