I own a 2016, sister just got a 2017, I seem a little jealous lol. Car looks exactly the same. Rims look a lot better for sure, shape of the car seems sharper as well but no real difference. What else am I missing?

 

Very little, certainly not in the body, what you observe is envy and not change.

there are new rim choices, package combinations and some tech tweaks but that's about it. Gearbox was biggest change from 7G craziness to 9g smoothness.

'lol'

 

I'm not sure if this is a model year difference but it sure seems like it to me. I have a 2016 that squeaks and rattles non stop. Twice I've had it in for service and got a 2017 loaner. Neither of the 2017's had any of the rattle issues I have. They were very quiet.

 

Have the same problem. The door panels and dash seem to be much better built in the 2017s than my 2016 (which I have been dropping off a few times for rattles, etc..). Also the 2017 seemed peppier and had a better take off than my 2016 (even though they were the same base trim, but mine is 4MATIC vs RWD on the loaner so not sure if that has an effect)

 

Looking at your previous posts you have a base model with base wheels, maybe your sister got the Sport Package which changes the wheels AND the body of the car.