Well that would work from 1997-2000 because they OBC had it's own display then. From 2001 on the OBC shares it's display with the trip odometer below the tach. So the only way to display the OBC functions is to have something to switch the display (hence the factory stalk or the switch hack).
However I personally think they should just have the OBC standard (hell all the software and sensors are already in the damn car :P)
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