I looked in my manual and could not find so went out and played with car and found how to do. 1st push the main page button (the one that has main over dark), then push that mouse control button then you will see a setup and configuration screen click the config and you will see temprature setup and just change to F.
Those instructions work for the Information unit, but have no effect on the display in the center of the instruments. The temp display I need to change is the one shown just below the transmission gear display.