Selectable Driver Modes are featured on this and the next page of the 2017 Ford Mustang sales brochure. The text on this page reads, Drivers: Tab this. When conditions change, just tap a toggle switch on the dash to adjust Selectable Drive Modes. And keep going. Each mode activates predefined powertrain and chassis calibration suited to that particular driving situation. Normal mode delivers a balance combination of comfortable, controlled ride and confident handling for an engaging driving experience. Track mode allows you to push closer to the vehicle's limits on the track before AdvanceTrac electronic stability control intervenes. So you can extract the max from your Mustang. A description of the other two modes are on the next page.