Had one faulty coil, after changing plugs.
Went ahead and replaced all 6. Plus new plugs.
Parts coils $28x6
Parts plugs NGK $8x6
Car runs like new!
All of a sudden my car started to vibrate immensely. Called my reliable mechanic (Audi genius) and he diagnosed over the phone that it was my coils. Taking it in today to have replaced.
2 of the coils failed at different times leaving me stranded and audi didn't provide a loaner or cover the tow