Radio silence

[conner@ra.cfm.ohio-state.edu (David Conner)]

The factory installed radio in my '89 100 has quit altogether...no lights,
sound, nothing.  This after several months of intermittent failure where it
would go off, then resume after jiggling the on/off knob.
It says AUDI DELTA on the face plate.
I recall previous posts on this subject referred to replacement by the
dealer at surprisingly low cost ($65?).

IS there any reason to expect the dealer to replace/fix this under some sort
of warranty?

I also seem to recall there is some problem with finding an after market
radio to fit in the dash?

Is there a trick to removing the radio?
  (There are holes at each corner of the face plate)

Any help would be appreciated.

David Conner        maintaining:  87 5KS   (95k mi)
Columbus, Ohio                    89 100   (70k mi)