The OBC in my E28 M5 was apparantly replaced by a PO with the OBC from a 535. The major dif seems to be the milage and range calc which is very optimistic. Although it would be nice to get 20 mpg, 15 is more realistic.
Does anyone have a M5 OBC that they are willing to trade/sell? Or is there any way to reconfig the one I got?