Fiat Chrysler CEO Sergio Marchionne wants the automaker’s Jeep brand to double its global sales to more than 1.5 million vehicles by 2018 with strong growth in South America and China, sources said.

Marchionne sees the iconic U.S. brand as one of the main pillars of growth for Fiat Chrysler and will announce his ambitions for Jeep when he unveils a new five-year product and business plan for the combined Italian-American company on Tuesday, sources said.