Engine Contaminants
WARNING: This page is about a different car, the 2016 Audi A8 Quattro and 2015 Audi A8 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
To prevent foreign objects from entering when working on the engine, seal open intake and exhaust channels with suitable plugs, for example from the Engine Bung Set:VAS6122 .
NOTE:
If there is mechanical damage to the turbocharger. Refer to TURBOCHARGER, REMOVING AND INSTALLING .