Audi world, some of which are shared with other VW Group marques although many sub-assemblies such as engines and transmissions are manufactured within other Volkswagen Group plants. Audi's two principal assembly plants are: Outside of Germany, Audi produces vehicles at: In September 2012, Audi announced the construction of its first North American manufacturing plant in Puebla, Mexico. This plant is expected to be operative in 2016 and produce the second generation Q5. From 2002 up to 2003, Audi headed the Audi Brand Group, a subdivision of the Volkswagen Group's Automotive Division consisting of Audi, Lamborghini and SEAT, that was focused on
Audi A6 and Avant bodies. The C4 design was available with the following engines: Upon introducing the C4 series A6, Audi made small revisions to what was previously known as the Audi S4, renaming it the Audi S6; the S4 name would eventually be re-used for a completely different model derived from Audi's smaller Volkswagen Group B platform-based Audi A4. As this was the first S6 model from Audi, it is commonly referred to as the "Ur-S6", derived from the German augmentive, "Ursprünglich" (meaning: original). It was available as both a saloon/sedan ("typ" 4A5), and an "Avant" ("typ" 4A9) (estate/wagon) to European