 I've had my 2011 A5 s-line 2.0t for over 4 years now, and it has met or exceeded all expectations.  It did have an oil burning issue that is common to certain years of a4/a5/q5 with the 2.0t engine.  This was fixed under warranty without issue and the car hasn't burnt a drop of oil since.  Only other unscheduled maintenance in 4 years was a pcv valve that recently went bad and started making a screeching noise ($350 iirc).  Overall at 73k miles now it has been very reliable, maybe moreso than expected, given my previous experience with owning vw/Audi, knock on wood.  The car is on its 3rd set of tires, and I have not replaced brake pads and rotors yet in the 4 years and 50k miles I have owned it. City driving will give 21-22 mpg, with 30+ on the freeway (I've gotten over 500 miles on a tank before).  The car is not fast but it is quick enough, and handles well.  The build quality is great, especially interior materials, with no significant rattles on what is almost a 6 year old car.  Rear seat space is good for a two door - I am 6'2 and have ridden back there comfortably on reasonably short trips.  Trunk is large for a coupe.  If I could change anything, it would be to have the sunroof open and not just tilt.  Bluetooth audio would also be nice, not just phone compatibility. I am still a huge fan of the a5's styling and think it will look classic for years to come.  I plan to keep it for at least a few more years.  Overall I would highly recommend this car to a prospective buyer, just make sure it has has the piston ring/oil consumption repair done under warranty!