I have regular maintenance done on my Audi and just had it at the dealer for a warranty replacement. The dealer did a "check" on my entire vehicle and suggested new break pads... my brake light came on 2 days later hummm? They said there were no codes and everything else checked out fine. Here is my dilemma...my q5 has been running great...until yesterday. We drove it to dinner and back Sunday night with zero issues or any reason to think something might be wrong. My husband went to start it Monday morning and it began violently shaking immediately when it started. Drove it a few feet and turned off the engine. Tried to start again and electrical comes on, but nothing else. Codes PO301, 302, 303, 304, and p0016 have been thrown along with a few others I can't recall. It seems bad. Really really bad!! We had it towed to our mechanic and are waiting to hear the diagnosis. Anyone else have a sudden issue like this? Any ideas on what the issue could be? It's concerning because my car was great one day with a seemingly disastrous start the next. Thoughts?