Pirelli S.p.A. in Sao Paulo, Brazil, plans to invest $350 million in South America`s four-nation Mercosur trade bloc in the next three years, including $230 million in Brazil. Carlo Buoara, the Pirelli group`s directing general manager, told a seminar in Sao Paulo that the company also will expand its existing fiber-optics cable plant in Sorocaba, Sao Paulo.