hey have a 2000 audi a4 2.8 quattro. the mpg gauge randomly went away and now it only has a small circle with a slash in it, and it says 28 mph. its been there for over a week and doesnt say my mpg anymore. what was the cause of this?

 

thats tellin u the average mph uve been goin on the right side of the wheel on the wiper stick there will b an up and down button push up or down and it will go through about 5 different selections and one of them will be ur current mpg