Driveshaft and Steering Gear:
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Audi S6, 2018 Audi A6 Quattro, 2018 Audi A6, 2017 Audi S6, and 2017 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
-- With the steering locked: check all around the driveshaft ball joint boots -arrows- for damage and proper seating.
-- Check all around the ball joint boot -arrow- of the steering gear for damage and proper seating.
-- Repeat the component checks on the opposite side of the vehicle.
-- If a defect was found when inspecting the specified components, replace the respective component.