Originally Posted by dbw47
thanks for your help, i am not sure what easter egg screen is.
That is the 'hidden' screen if you have either an SRT or an R/T with Elect. Conv. Grp (steering wheels controls) where your car is equipped the the upgrade Elect. Veh. Info Ctr cluster. (not on SE's or R/T F-package [base cloth interior]).
If you do have this, hold the botton right [compass] button and the bottom left [music note] buttons down for at least 5 seconds until the display changes and it will put the diagnositic screens up (with the ignition on, engine running). Using the up/down buttons you can scroll through various screens. To get back to normal displays, press the menu button and you're back, or shut the ignition off and it resets as well.
There's one that will display coolant temp, rpm, % of throttle and oil PSI.
Again, you need the EVIC/ steering wheel buttons if your car is equipped with that to get to the display.