You need two keys which you slop in on either side of the radio. You can get them from most car accessory shops for a few pounds. They open the two latches on either side, allowing you to pull the stereo out with the keys. You can also do it with four screwdrivers if they are a nice fit in the holes at the side but this is quite hard. You have to push them in enough to open the latches and then push them out slightly whilst gently withdrawing them. Eventually you will get the radio out but it usually marks the holes and is not advised.
Dave, April 2006