I know there’s an old thread on this already and I have followed its instructions to a T. I’ve bought all the correct cables and hooked them up as directed. The car recognizes I have a video port hooked up but all I get is a black screen with no video or audio. I’ve gone over everything very well and no idea why I can’t get a mirror image on my MMI screen. I have a 14 A6 Quattro TDI using an iPhone X to link up to it. Any help is appreciated!