Audi A6 (C5) Service Manual: 1998, 1999, 2000, 2001, 2002, 2003, 2004: Bentley Publishers: 9780837616704: Books - Amazon
Amazon - Audi A6, S6 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 including Avant, allroad quattro, RS6 Repair Manual on DVD-ROM (Windows 2000/XP): Audi of America: 9780837612577: Books
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2003 Audi A6 Specs, Price, MPG & Reviews | Cars.com