The new 2012 Citroen DS9 is highly dependent on the Metropolis concept and is also known as Lemon Metropolis DS9. Citroen plans to DS9 in the Asian market with force.Citroen has long been in the shadows of the Germans. The DS9, which is based off of the Metropolis concept, is the company’s attempt to move up market and challenge the Mercedes-Benz S-Class, BMW 7-Series, Jaguar XJ, and the Audi A8.