This trend had been heralded a short time earlier by the Scirocco and – as the first Volkswagen front-wheel drive car, following the K70 that was taken over from NSU – the Passat, introduced in 1973. With the launch of the Golf, the highest volume vehicle category had now also been switched to the new technology. As the successor to the legendary Beetle, of which over 21.5 million units were built, the Golf I, designed by Giorgio Giugiaro and Volkswagen Design, had to live up to the immense expectations that it would carry on the success story of what until then was the world's most successful car. It worked: The modern and reliable drive concept, the excellent spatial economy and ultimately the design as well, won over the market to such an extent that production of the one-millionth Golf was already being celebrated in October 1976. Like every Golf that would appear after it, the first generation, too, reflected the progress and automotive trends. In launching the first Golf GTI (in 1976), Volkswagen heralded the introduction of greater dynamism in this class, while the Golf D (naturally aspirated diesel engine, 1976) and the later Golf GTD (turbodiesel, 1982) marked the breakthrough for diesel cars in the compact segment. With the Golf Cabriolet, introduced in 1979, Volkswagen launched an open car on the market that was at times the best-selling open car in the world. 6.99 million vehicles of the first generation Golf, including all derivatives such as the convertible and the Jetta (at that time structurally identical), were sold – 0.87 million Golf cars per year. Golf II. It was the second generation Golf that was the Volkswagen in which the baby-boomer generation, people who are now in their fifties and sixties, learned to drive. While its predecessor had already become a favourite of all driving instructors and learner drivers, the second Golf had now become firmly and inerasably established in the minds of these temporary allies.