if i'm correct the radio display need to be set to match the radio, i suggest you try this method of switching the display to match the radio:
With the car ignition on, press and hold buttons 4 and 6 together and switch on the radio whereupon it will show either DISPLAY 8 or DISPLAY 10. Keep the buttons held until the radio beeps and the display will change from 8 to 10 or vice versa.
Release the buttons, switch the radio off and then back on and hopefully the radio will now operate correctly.
s
December 2008