So I get in, start it up and everything is normal on the center display, where it says about pushing in the brake pedal and all that good stuff. I press the brake, put it in drive and OK flashes in yellow like normal, then the screen is blank. No radio station display, no gas mileage info, nothing, just a dark display. I checked the manual and didn't see anything. Any and all help would be appreciated. Also I did a search on here and didn't find anything. Thanks

99 A4QT

Thndrlight

 

push the button under your wiper controls

 

teh newbeh [8D]

 

It took me a while to figure this one out after I got mine, and like you said, the owners manual is worthless. There is a button on the windshield wiper switch on the right side of the steering column. The button is on the bottom of the lever, and there is a up/down toggle on the end of the lever. The up down button allows you to scroll between gas milage average, current cas mileage, average speed, and trip time. To turn the display on and off, click the buttom on the bottom of the lever. To reset things such as mileage, speed, and trip time, hold down the button. Hope this helps.

 

Note that you get two different driving computers, one with data for accumulated driving and one with the current trip. There is a small '1' or '2' in the corner over the carputer display. Both can be reset independently. You can see wich is wich by going to 'driving time', you'll notice that one of them is much higher than the other.