Reflex features an advanced diesel-electric hybrid propulsion system that harnesses diesel, electric and solar power. According to Ford, this combination of power can deliver maximum fuel economy – up to 65 mpg – without compromising performance. The concept features an electric motor on the rear axle in addition to the hybrid propulsion system on the front axle. The rear motor provides all-wheel-drive capability, improved driving dynamics and the fuel economy benefits of a full hybrid vehicle. The Ford Reflex concept features solar panels in the headlamps and tail lamps that recharge the hybrid-electric battery pack, and solar panels in the roof that power electric fans to cool the interior while the vehicle is parked. Reflex's energy is stored in a new-generation lithium-ion battery pack, using the same technology found in cell phones. The battery-charging lighting system improves fuel economy by using the sun's power to charge the on-board batteries, while capturing and reusing the daylight at night. Reflex also uses ground rubber from scrap athletic shoes, called Nike Grind, as insulation to reduce noise and vibration in the car's interior.