Unknown Audi mule spied in California

Spy photographers were baffled when they caught this mule undergoing hot-weather testing in Death Valley, CA.Rumors suggested that the mule is a possible A5 Sportback. Considering the wheelbase on the vehicle seems unchanged, the A6 is 3 inches longer than the A5 coupe. Raise ride height and 20 inch Audi Q7 alloy wheels doesn't sound like an A5 Sportback. Another rumor is that it could be the A7