center of dash comes of and on cant tell about the gas gage or the milage
There could be a bad connection to the display that could be easily fixed or there may be a problem internally inside it.
Hopefully it is still under the 3/36000 warranty . If the display has to be replaced it would be big $$ if it is on your dime .
My Chrysler-specific questions have usually been well answered by people at the allpar.com site. There are many forums there; the minivan forum has given me lots of help over the years.