When it comes to the auto show circuit, Frankfurt's IAA is likely one of the biggest in the world. It's certainly the biggest in Europe, and in as much it is always a safe bet as a major newsmaker for the Audi brand. Concept cars, new models, new tech and more are key to Audi's presence at Frankfurt year-over-year. Most pertinent launches to Audi's current business is likely that of the new D5 A8. Though this car sells in far fewer numbers than most of its stablemates, it remains the benc...