my radio is locked, it say's "Safe", how do i unlock it ? i replaced a fuse. ho on 1996 Audi A6

i replaced the fuse for the radio. now the radio is locked. the screen for the radio say's "safe". how do i unlock this ?

Asked by for the 1996 Audi A6
call dealer or look in your car manual should be a code to put in they do this so your radio doesnt get stolen i guess