The Sterling Acterra. A modern line of stylish class 5-8 trucks. With a premium cab that offers the same convenience, creature comfort, operating efficiency, strength, and durability as the cabs on heavy duty Sterling models. It's a modern cab with excellent styling, yet designed to be tough... and flexible. The Acterra can be customized to meet the needs of nearly any application, offering the cost-saving fuel economy of the latest electronic diesels from Caterpillar and Mercedes-Benz.