Enhanced look, more power and better tech - the 2016 Audi A6 is a car that just does everything right.It’s been nearly 4 years since I tested the all-new 2012 A6 and in that amount of time, a car can often become quite stale. Which is why it’s even more surprising that this refreshed 2016 model still feels like the class leader; the most appealing choice in the $50,000 + …