V50 Engine Turbo : Removal cd changer. C70 2006> precautions

[0006Andy]

I have a c 70. 2006> 2.5 t5 model. It has a floating centre console with multichanger cd which has a deck error.
The local dealership has quoted a silly figure to take it out and only recommends complete replacement at approx £800 a unit.
A local auto electrical company is happy to examine it and there is a chance it could be repaired.
I know I can remove the unit myself however I have the following questions I need to answer before I attempt it.
1) what precautions should I take
2) would I upset any network or computer by removing the unit.
3)would I have to have anything re-set by Volvo workshop
4) what functions would I lose while radio disconnected
5) if removing cd changer , can I reconnect radio pending reconnection of the changer.
6) can I drive the car without effecting systems once changer removed whilst it is being assessed
7)if changer is knackered what options do I have for replAcement or alternative iPod aux connection

Can anyone point me to a good online link which would help any aspect of this

Thanks in advance for anyone's help