Audi Rs4 Owners Manual - The Audi RS4 quattro is the top tier and highest performing version of some specific generations of the Audi A4 range of automobiles. It is a sports-focused compact executive car (often called sport compact  in some countries [which?]), produced by Audi's high-performance private subsidiary Audi Sport GmbH, in limited numbers, for German car manufacturer AUDI AG, part of the. The Audi A4 Service Manual: 2002-2008 contains in-depth maintenance, service and repair information for Audi A4 models from 2002 to 2008 built on the B6 or B7 platforms. Service to Audi owners is of top priority to Audi and has always included the continuing development and introduction of new and expanded services.. The Audi S4 is the high performance variant of Audi's compact executive car A4.The original Audi S4, built from 1991 until 1994, was a performance-oriented version of Audi's 100 saloon/sedan.All subsequent S4s since 1997 have been based on the Audi A4; and as the A4 has evolved from one generation to the next, so has the S4. A more powerful internal combustion engine, larger upgraded.