I just purchased a 2019 MKC Reserve & have some questions. The car I replaced had an O/D Off button on the gear shift knob that I pushed while driving down a mountain to help the car brake. I can't figure out how to shift to a lower gear on this vehicle. I'm thinking it is the "S" button, but if so, at what speed can I safely shift into it & how do the paddle shifters on the steering wheel work? The brochure doesn't adequately explain the different gears. I'm going from a 2002 RX 300 to this vehicle & there are many differences. Thank you for any help you can provide.