Audi A6 C7 Service Manual - May 2026

You need a hybrid approach.

If you smell oil or hear a whistle from the engine bay, your Positive Crankcase Ventilation (PCV) valve has failed. On a Toyota, this is a 10-minute job. On an Audi C7 3.0T, it is buried under the supercharger. Audi A6 C7 Service Manual -

While not a manual itself, the Ross-Tech VCDS (Vag-Com Diagnostic System) is the companion to the manual. The manual will tell you how to adjust the throttle body, but VCDS is the tool that allows the car's computer to "learn" the adjustment. The service manual often references VCDS procedures (Basic Settings) that must be performed after mechanical work. You need a hybrid approach