Wrangler's all-new 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. Hill start assist helps you when starting your Wrangler from a stop on a hill by maintaining the level of brake pressure applied for a short period after the driver’s foot is removed from the brake pedal.