I.M.G.

I have a C5 with a radio/cd. The cd has broken, and I will have to get a new radio/cd. I have found a secondhand replacement (similar model, but from a Picasso). I would like to think that all I do is unplug the old radio and plug in the new one. Is it as simple as this (I realise I will need to enter the code) or am I being a bit niave in todays complicated world. I have the code for the new radio/cd.