For the platform (2012–2018), you can access service documentation through several specialized resources providing full factory workshop manuals, specific maintenance guides, and general owner information. Factory Workshop & Service Manuals
No free complete service manual exists for the Audi A6 C7. The is the best print option, while Erwin provides authentic factory data. For DIY maintenance, combine a subscription to Erwin (for torque specs + technical bulletins) with a VCDS diagnostic system. Always follow VAG-specific procedures for transmission fluid changes and component coding. Audi A6 C7 Service Manual -