Combination Valve, Checking: Procedure: Notes
WARNING: This page is about a different car, the 2018 Audi A6 Quattro, 2017 Audi A6 Quattro, and 2016 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
- Vacuum lines and hose connections free of leaks.
- Vacuum lines not plugged.