The Citroën DS was a front-engine, front-wheel-drive executive car manufactured and marketed by the French company Citroën from 1955 to 1975 in saloon, estate and convertible body versions. Italian sculptor and industrial designer Flaminio Bertoni and French aeronautical engineer André Lefébvre styled and engineered the car. Paul Magés developed the hydropneumatic self-levelling suspension. Commended for its aerodynamic, futuristic body design and innovative technology, the DS set new standards in ride quality, handling, braking and was the first production car equipped with disc brakes. For the 1968 model, the DS was again restyled. This version had a more streamlined headlamp design, giving the car a notably shark-like appearance. This design had four headlights under a smooth glass canopy, and the inner set swivelled with the steering wheel. This allowed the driver to see "around" turns, especially valuable on twisting roads driven at high speed at night or even at T-junctions in a town. The directional headlamps were linked to the wheels by cables. Behind each glass cover lens, the inboard high-beam headlamp swivels by up to 80° as the driver steers, throwing the beam along the driver's intended path rather than uselessly across the curved road. The outboard low-beam headlamps are self-levelling in response to pitching caused by acceleration and braking. A car years ahead of its time and considered by many to be Citroën's best ever.