Thankyou for your response.
I wanted to be able to use the phone through the car, ie answer calls with the steering wheel button and then talk and listen hands free. Not so concerned regarding making calls etc, although I guess that could still be done on the phone.
Taking the car apart is not a real concern but it does frustrate me that I have button on the steering wheel that doesn't work. I was wondering what parts do I need to make this work. Is it just a change of radio unit, you mention another wiring harness, do you know the part number, is their anything else I need, and the other big question is does the car need to be re programmed which is clearly outside of my control.
I was hoping to keep the car OEM standard and I see that it is possible to buy the CD40 unit on Ebay. Any answers to the questions above are really helpful, cheers Chris