The original Audi C5 RS 6 Quattro ("Typ" 4B) was the top-of-the-line user of the Volkswagen Group C5 platform (1997–2004), and was initially available as a five-door five-seat Avant - Audis name for an estate or station wagon. A four-door five-seat saloon/sedan followed shortly after the launch of the Avant. Derived from the Audi C5 S6 (itself derived from the Audi C5 A6), the RS 6 also shares the aluminium structure from the firewall and forward with the C5 A6s with V8 engines (A6 4.2 V8 Quattro, S6 saloon/Avant). It was manufactured from July 2002 through to September 2004.