Citroen introduced at the International Francfurt Motor Show 2007 the concept C Cactus based on a Citroen C4 platform. The designers and engineers at Citroen have been working on a new idea for a minimal car. The idea was to reduce the sedan project to its minimum of parts in order to show cost reduction possibilities. The dashboard, for instance, is eliminated; essential concept is developed. The doors have no paint. Several elements are similar and can be exchanged.