It might look polarising to some, but the Audi A6 e-tron is incredibly well thought out, and a confident glance at Audi's new architecture.  At first glance, the A6 e-tron is about as slippery as they come, literally. With a drag coefficient as low as 0.21Cd if you tick the box for the Sportback and those camera-based wing mirrors, this is a car that slices through the air like a sushi ...