Open ash-tray fully, tilt it down and pull it out of it's guides. One screw holds on the ash-tray guide/slider plate, remove it, remove ash-tray plate. Behind the plate are two more screws, un-screw these and gently push the radio forward, unplug everything and then pull the radio out the rest of the way.
Then just screw the ash-tray plate back on and push the ash-tray back into it's guides (tilt down as before to get it in the guides), close it and there you go.