I'll be using my new 2016 MKC for some mountain driving. I am just trying to understand engine braking in this vehicle since the set-up is a bit different from what I am used to. A Lincoln rep told me that if I pressed the "S" and didn't touch the paddles, the car would auto engine-brake for me as I descend the mountain. A second option would be to leave in "D", slow to the desired speed and tap the paddle to downshift. The manual indicates this provides "temporary" downshifting, which makes me wonder what that means. The manual and videos are a bit sparse on this topic, so I'd like to have a firm understanding before I come barreling down a snowy mountain! What have others been doing when descending steep grade for a few miles at a time?