When the wife started her 89 190e 2.6 this morning her radio made a "ticking" (relay like) sound. There was no display and the cassette drive spindles were in the down position (no cassette). She said that this has happened once before but after she turned the key off then on again the ticking went away.

I have ejected the gost cassette, turned the key off then on again but the ticking sound still remains. Also, the antenna is in the retracted position.

Help, any ideas on what is wrong and how to fix this? The car is stock.

thanks, Wayne