In the video I show how you can change the electric motors if the tailgate no longer opens and closes on its own.
There is a repair kit for this at Audi. I show the whole thing on my S6 C6 4F with a V10 engine, but the procedure can be used for all A6 C6s.
Parts
PROXXON socket set: https://amzn.to/3Ug6wFQ
PROXXON torque wrench: https://amzn.to/44HEaHz
Hazet assembly wedge: https://amzn.to/3UKo1g3
Hazet Light: https://amzn.to/3HhDSft
DJI Osmo Pocket 3: https://amzn.to/3Oic2DO