I'd love to get a cx-5' but live on a long, steep driveway which is ice and snow covered 5 months of the years. I need technology similar to low range 4WD, or a dedicated downhill descent button which allows the car to go slowly down the hill. Would the Mazda technology work on my driveway? Top downhill speed about 5 MPH. Responses in simple, non-technical language, please