I just spend a bundle on repairs. I bought the S6 new and have kept a tally on the costs of ownership. I outsource all the work. I used the dealer when under warranty then mostly switched to a reliable independent mechanic. Aside from non essential costs (JHM upgrades, aftermarket wheels etc). I have spent roughly 30K on repairs/maintenance in 12.5 years which translates to $2400 a year.
Attached is a jpeg(2 pages) of my S6 Audi maintenance spreadsheet. Just putting it out there FYI.
Was it worth it? Oh yeah! You have to pay to play!