Until 1958 only lorries were produced in the Brazilian plant, and local body builders used lorry chassis to make buses. In 1958, the integral bus Mercedes-Benz O321 H also started to the local production, supplying the local market as well as the market of other South American countries (although some Latin-American operators also bought European-made Mercedes-Benz buses). For instance, 550 units of Brazilian-made O321 integral buses were exported to Argentina in 1961, and other 300 units were exported to Venezuela in 1965.