http://PreferredAutoImports.com 866-924-9139 The road can be a threatening place, but with Hill Descent Control and Hill Start Assist, Liberty has the agility to help you navigate life's ups and downs. Hill Descent Control with grade sensing allows a smooth and controlled hill descent on rough or slippery terrain without the driver needing to touch the brake pedal. This system applies the brakes to each wheel individually when needed to reduce forward motion while negotiating down steep grades.