Serious Radio problem

Hello,

for the past week my radio in the 166 has shown some symptoms of malfunctioning, basically during a trip it would suddenly go completely silent, and no matter what channel I choose nothing would be heard. At the moment I can seek frequencies, but only using the inner menu in Audio. I am not able to select channels with numbers on the keypad. It shows FM-B, is this correct? Also when trying to press AM nothing happens. Seems to be able to read Cassettes and CDs ok, at least it shows there is none in the drive.

Help would be very much appreciated. Thanks!

Stam