2015 Greygoose

Hi guys, Helping out my father in law Who got to for a ride by a local garage. Picked up his car from the garage and instruments panel was not working, amongst other things. Quicker to state what is working. Starts, runs and drives. Also working are, power seats' rear windows, dome lights and power fit locks. I've visually inspected all fuse. All are good. Alternator was pulling 15 volts. In the process of changing that now. Any help would be greatly appreciated. Thank you.