Radio message "WAIT" after new battery

After setting all winter had to put new battery in my 94 SL500. When I turned on the radio, I got the expected Enter CODE message.

I entered wrong code initially, then remembered I had replaced the radio a couple years back. Entered the correct code and now get a "WAIT" message appearing.

What do I do? Is there a reset or something I need to do?

Thanks,
sbrown955