The second concept previewing the next-generation, all-electric Audi A6 e-tron family has been revealed. Called the Audi A6 Avant e-tron Concept, this is the sexy battery-electric wagon of the future. At 16.3 feet long, 6.4 inches wide, and 4.7 inches tall, the long roof version’s dimensions are identical to the A6 Sportback e-tron Concept shown […]