you wanna be using the euro removal keys that have allocated direction for insertion.
the slots are located just inside of the edge horizontally. the euro keys go in a particular way but u do not need to push them all the way in as the springs that are holding the radio in are relatively near to the front of the radio face. Push euro keys in slightly and using the ringpull ends of they keys, lift them up and pull gently and the radio should just slide str8 out freely!
All the best.