Parts have been ordered! Hope this turns out good!!!!
I think you will succeed since you have the S model it should be plug and play!
I just completed my camera installation following jelloslug's detailed instructions and parts list. The only problem was that with the SV I have no camera wires at the B18 connector.
It was necessary for me to run wires to the front of the car but I resisted going directly to the NAV unit (I hate opening dashboards). The junction of B3/M21 is behind the drivers side kickplate trim. M21 had camera wires but B3 did not. Now I knew why I found no camera wires at B18 in the back of the car.
I grounded the camera sense wire (pin 7 on M21) and the NAV display switched to the rearview display when shifting to reverse. I could not find these wires on the service manual drawings for the Navigation without Bose.
I'm delighted with the results in spite of needing to run wires to the front of the car but not to the NAV display! Note: the kickplate trim was very easy to remove!
Thanks to all the posts guiding me in this project!!!