Update - I'm an idiot!! original problem was that I hadn't fully pushed the correct plug/connector into the socket!! Once that was done, the stereo turned on... But now, that leads me to my next problem!!
Everything seems to be wired up correctly, but the the switching of sound between stereo and Parrot/iPhone doesn't work properly...
When I go to the menu on the Parrot device, it says "Phonebook" through the speakers, then switches to the sound of the cd playing on the stereo, then it switches off the sound... then on, then 3 seconds later, off...
Then nothing!! So I can leave the Parrot device as idle (as in not playing/streaming music etc), and the stereo sounds will not kick back in to working!!
Any ideas??