 The 500 by Diesel is based on the 500 Sport, using the same 1.2 L petrol, 1.4 L petrol and 1.3 L diesel engines.The 500 Aria is a concept car based on the 1.3 L Diesel vehicle, but with diesel particulate filter, Stop & Start system, Dualogic transmission, recycled rubber floor from used tires, recycled and woven leather upholstery (mataleather) by Matamata, Ecolabel polyester fabrics by Apollo company.The vehicle was unveiled in the 2008 Geneva Motor Show.