BMW E36 Digital Climate Control . . . Secret Test Functions http://www.bmwe36blog.com/2008/06/27/bmw-e36-di... The BMW E36 digital climate control unit has a feature that allows different sensor values to be displayed on the control panel. The display mode is called up by pressing the AUTO and REAR DEFOGGER buttons simultaneously. 12 displays are available and you can toggle through them by pressing the fan rocker switch.
