Hello-- I have a 2012 SEL Premium, and am considering having this camera installed. I have a VAG-COM cable, and I can "enable" the camera myself. My question is whether I can turn this feature on before I have the installer put the camera in, or if I need to have it all installed before I make the programming change. If it won't mess anything up, I'd like to have it set up to function ahead of time so that it can be tested and confirmed working before I drive it away from the install place. Thanks in advance for your input.