Very very Odd Problem.
4 Month old Box. Not sure what happened !!!! Could had been lighting, it was parked under a tree in our house during a thunder storm, I honestly don't know, but here are the symptoms

Dome light doesn't work.
Gauges don't work. (Only think that does is the speedometer.)
Odometer is out
AC and fan are out
Rear defroster won't come on
Power windows, Power locks don't work
Radio won't work

Car runs great !!!! I checked all the fuses and those link fuses ( the ones that have the window on top) They all check out. Checked not just visually, but with an ohm meter.
Car runs just fine, What is the deal ??? but I guess as of now, I'm planning a trip to the dealer 1st thing Monday morning.

 

4 months old? sounds like a warranty issue to me. I would say trace the circuit but have the dealer doit.

 

It spunds like it may be lightning related, but usualy it is all or nothing. Take it to the dealer.