How do you remove radio from 1991 VW cabriolet?

You only need a pair of the special "radio removal tools" for that car. Most audio/ electronics shops will carry them. They look like a very thin piece of metal--about 1cm wide with a notch on the top and bottom as you hold it vertically. Each will fit into the small vertical slot on either side of your Preset buttons. Slide in, hear it click into place, and simply pull out. Then you unplug the power and signal cords from the back (2 plugs, very obvious). (If your radio still works, I'm looking for one, lmk!)