At the management of Citroën, it was estimated that the standard of living of the French and Europeans would rise, the 2CV had just been successfully launched and an heir to the 15 and 11 CV had to be found. It was the VGD (Voiture à Grande Diffusion) project, the first sketches of which date back to 1945, which took shape. The management was entrusted to André LEFEBVRE, who resolutely opted for innovation in all directions. The bodywork was the domain of Flaminio Bertoni, the suspension that of Paul Magès. For the engine, Pierre Bercot took up the study of the old 1911 cc D engine. At the end of 1954, the project was frozen in its entirety. October 1955, the 42nd Motor Show. The first thing that strikes you is its aesthetics, which are unprecedented. It will divide France in two: the "for" and the "against". But the new was not limited to the bodywork, the hydropneumatic suspension ensured unparalleled comfort with four independent wheels, plastic became an important element of the bodywork with the roof and rear window as well as light alloys for the bonnet. So many new details follow: from the single-spoke steering wheel to the spindle indicators and doors without window pillars. The first convertibles were first designed by BERTONI and marketed by CHAPRON. The factory convertibles were mounted on the basis of the ID 19 and the cars offered with leather interiors. The cabriolet was marketed for the first time at the 1961 Motor Show for the sum of 22,000 francs, in comparison, a Dauphine at the same time was sold for 6,000 francs.