First in 1902 came the first in Russelsheim licensed cars, were sold under the brand name Opel-Darracq. In parallel, were actively developing a personal model. The first car Opel design was shown in the autumn of 1902 at the Auto Show in Hamburg. The audience presented a model 10/12 PS, equipped with two-cylinder engine of his own design. The market took beginner friendly.
Within a few years, Opel plant in Russelsheim was one of the most successful automotive companies in Germany. In 1906, that is, a total of four years after the Hamburg premiere, the brothers presented their thousandth Opel automobile. Broadened the range: the firstborn of 10/12 PS 20/22 PS model was added with a more powerful four-cylinder engine, appeared and cargo versions of these cars. The plant in Russelsheim is not fit to increase production, and in the same 1906 Opel opened a branch in Berlin. But the real breakthrough from a company committed Russelsheim Only three years later by launching its first bestseller – the famous Opel 4 / 8 PS Doktorwagen.
Machine, is not inferior to rivals in quality and degree of security offered only for 3950 marks – two times cheaper than their counterparts. In fact Doktorwagen fully able to claim the laurels of the first German 'people's car'. Whatever it was, serious market success in conjunction with the new year later adopted a modular system of consumption, which allowed complete 'semi' coachwork various types of wheels and engines, have played a significant role in the development of the company. In 1912 the total production volume goes to 10 thousand cars, and by 1914, surpassing all competitors, Opel is the largest German automaker. But ksozhaleniyu and could not reach the required quality, for example, the quality of AUDI … Successful business development has allowed the company to expand the field of activity. In prewar years, Opel engineers have worked vigorously over a wide range of 'non-core' issues-from agricultural cultivators to fire pump. At the same time have been made and the first production aircraft aspirations engines.