Thanks for all the how-tos and part lists.
I just ordered a used 4L0 gateway as mine has no RVC tickbox to enable RVC and also the Camera Contol Unit
to activate the correct Video signal to the MMI and add the steering guide lines.
I already have a suitable PDC ECU as standard and the TV tuner, so I think just a matter of wiring and camera.
To keep the cost low, I was hoping to use..
http://www.aliexpress.com/item/Water...854346160.html
as long as it has no guidelines - most aftermarket cameras seem to have static guidelines superimposed.