Removing a Fiat 500 radio is easy and requires no technical skill.
First you need radio release keys to extract the radio, these can be bought Online.
Push the keys into either side of the radio as shown, this will free the unit to be pulled forwards.
Once you have the radio release keys, push them into the 4 holes in each corner of the radio (See image).
apply a little pressure and the radio will release from the dashboard. The radios label will be located on the radio's casing.
There are different models of radio, each have different serial numbers, yours will be similar to one of the following examples:
815 CM 1234 B 1234567