I know my '13 had the functionality on all 4 doors. It had to, as I have two dogs and tend to open the back doors for them before opening the front door for myself, and I know it worked that way for the 2 years I had it. And as I have been "spoiled" with that, since it's much easier to leave the key in my purse most of the time, I'd really like to know why it's not working on the new car. Mainly, just want to verify it's something that's been removed for the '15s, rather than just my car not being built properly (I did retail order it to my specifications).