To transmit audio from your phone to the radio, you have to have a FM Transmitter in your phone. Which the
N95 don't have.
You can use blue tooth, if your car CD player has a bluetooth receiver.
Alternatively you can use a 3.5mm jack cable to connect from your phone to an aux input on your car cd player.
Finally you can use a stand alone FM transmitter, which you connect to via Blue tooth. And that then transmits to a spare radio frequency.