Chrysler Repair: Satellite Radio, 2005 300c, satellite radio

Question
I have a 2005 300C and wanting to know if the radio in my car can be used for Satellite radio. The code for the radio, is (RAK).  I got the code from the owners manual.  The picture looks like the radio in the car.  When I push the PTY button the different satellite sections appear on the display.  Do I have to install an antenna to make it work with satellite or is there more to it?

Answer
on the front of the radio has the code for the it on there  take a look it will be small the owner manual will cover a bunch of different radios  plus if u give me the last 8 of the vin I can look it up and tell u if it came with it  and if not what a mopar unit might run inorder to get it.