Renault R REg espace diesel radio not working?

The radio unit is stowed under the drivers seat. I would suspect the fuse that is on the back of the radio unit has blown (happened to me after a muppet tried to jump start off me). You will need to remove the drivers seat and the on the back of the radio unit itself where the connectors are it has a blade fuse (i think its red) that will need to be changed. Hope this helps.