 I live in a city and rarely take road trips.  After ten months of ownership and replacing all ignition coils I went for one.  Two hours into the trip felt slight vibration that stayed the same for the rest of the trip.  An hour away from home on the return trip vibration started to worsen and became very bad right out of city limits.  Immediately to dealership where i was informed the crankshaft was warped.  New engine from Audi 13,000 with wait for it a 90 day warranty.  Local junkyard 2,000 for a used engine with two year warranty.  In the end I traded it for a Ford.