Pagani's first model, the Zonda, is powered by a mid-mounted DOHC V12 engine manufactured by Mercedes-Benz's AMG division. It debuted at the 1999 Geneva Motor Show. By 2018, a total of 140 cars had been built, including development mules. Both 2-door coupé and roadster variants have been produced along with a third new variant being the barchetta. Construction is mainly of carbon fibre. The Zonda's production run ended with the Zonda HP Barchetta. Only three were produced with one unit retained for Horacio Pagani's personal collection.