hi my radio buttons have stopped working but the power button works and the unit switches on and plays the cd ,but u cant use any button but the eject .Had it scanned and came up with fault code

Control Module Part Number: 8L0 035 195 H
Component and/or Version: symphony II NP2 0151
Software Coding: 00201
Work Shop Code: WSC 00844
1 Fault Found:
65535 - Internal Control Module Memory Error
00-00 - -

any one got any ideas cheers