Does the GPS feature of Smart Air Suspension work as well as claimed? My main reason for getting Smart Air Suspension is for our steep driveway. I like the idea of the car automatically rising as I approach the driveway. How does this work in practice? If I'm driving down my street about 100 feet form the driveway, going about 10-15 MPH, will it start to rise? Or do I need to wait a few seconds at the base of my driveway before driving up it?