Just purchased a 2006 Audi A6. Love the car but cannot find average mpg. on 2006 Audi A6

The manual says there is supposed to be a control at the end of the windshield wiper control arm to change the computer to see average mpg. My car has no such control. How can I view the average mpg on this car?

Asked by for the 2006 Audi A6