Based on the Audi Al2 concept car first shown at the Frankfurt Motor Show in 1997,[3] the A2 was notable for being constructed from aluminium. Packages available in Germany included 'Advance', 'Style', 'High Tech', and later 'S line'; whereas in the United Kingdom, the A2 was available in various trim levels, including: 'Standard', 'SE' (for 'Special Equipment'), 'Sport', 'Special Edition' (2005 only). The car was built in Audi's Neckarsulm 'aluminium and RS plant' on a special line purpose built for the aluminium A2, the last cars left the factory in August 2005.[1]