Am I missing something? Can't you see this in the Combination Meter in the dash? This is from the manual.The reason I wanted to do this, btw, is because I want to see the gas mileage (fuel efficiency) since the last time I filled up. I routinely reset the trip odometer at each fill-up, but if the driver registration system recognizes me, it insists on showing me my average gas mileage for the entire time I've owned the car, and it allows me no option to see short-term gas mileage.
The fact that I'm the only driver of this car also lets me get away without having it recognize me.