Citroen take on the French government's 2L/100 km (2 liters per 100 kilometers) vehicle program. It is adopting an Hybrid Air drivetrain combining a 3-cylinder gas engine and a compressed air energy storage unit, a hydraulic pump and an automatic transmission with an epicyclic geartrain. Their design has variable-geometry components; variable air vent intakes, active side deflectors and wheel covers with vents controlled by centrifugal force. It has tall & narrow low rolling resistance wheels, front corner air curtains, extended top spoiler, full length underside panel channeling into rear extractors, rear & side cameras and full LED lighting system.