2018 Grand Cherokee Overland 5.7l Hemi
Took my GC to the dealer this week and asked them for a software upgrade since I was at Rel 17. They decided to NOT do the upgrade since a new release would be coming soon. They recommended that the upgrade be done on my next maintenance visit. They also told me that I needed to use an Apple branded lightning cable with Apple CarPlay. IOW, if you don't use an Apple cable, it'll be touch and go as to how it will work. They told me all of this after 4 hours!. So they did NOTHING to the car yet it was there for 4 hours.