You remember when Porsche
unveiled the Panamera Sport Turismo concept at the Paris show last year? It didn't just feature a potential wagon body-style for the four-door Porsche, it also packed a new hybrid powertrain, and previewed the styling of the next-generation Panamera. Now Audi
seems to be taking a page out its sister-company's playbook with a new concept headed for the Frankfurt Motor Show in September. Rumor has it that the German expo will include the unveiling of an Audi A6
Sportback E-Tron concept.