Hi! I've decided to replace my old Ford with a 300 after test driving several vehicles. I love the way it drives; and enjoy the comfort. I'm confused on a couple things though. I'm looking at mainly '16's. Some have 'Uconnect 8.4' and some have versions that look different. When I try to figure out the versioning of uconnect I find numbers that look like malformed IP's. (17.xx.xxx etc.) What is version 8.4? And is it the most recent one? Is there any way to upgrade it to use Carplay like Ford did with Sync 3 in their 16's? Also, I was looking at a 300S, but that looks like it may have gone by the wayside because I have to wait a week before I can pull the trigger and the dealer says he has people to buy it now. That's fine. I have seen a couple of '16 limiteds that looks very luxurious; but they seem very different. One has HID headlights, one has Halogen. One has uConnect 8.4, the other doesn't. Neither have the cool AC seats and rear heated seats of one limited I rented. I was surprised that both were about 2K cheaper than the S. Is 'Limited' really a trim level? It's just confusing because all the S versions I've looked at seem to be about the same. Thank you for any help!