Quote Originally Posted by Spasso
I have been told by an E46 guy that on his car you press the "Auto"(heat) and "Forward Defrost" buttons at the same time to change the scale readout. Both of these buttons are on the heat display panel not the OBC.

I won't be able to try this out for about 8 hours. Someone want to give it a try?
The E46 reset method didn't work