Gullwing America was a specialty coachbuilding and tuning company based in California. It was owned and led by Arturo Alonso, who acted as chief engineer. The company concentrated on Mercedes-Benz models and on retro-styled cars that combined the appearance of classic designs with modern donor platforms. In 2009 it produced a Mercedes 300SL replica using engines from the Mercedes SLK 55 AMG. Also in 2009, after the introduction of the…