Built over the Epsilon platform, the Opel Vectra C of 2002 was initially available as a four-door sedan and a five-door hatchback, known as the GTS. A five-door station wagon was added in 2003, along with an "executive hatchback" sold under the Signum nameplate. The Signum, which is based partially on the Vectra C features a completely different layout in the rear.