Seems like I'm also struggling with getting the vcds cable plugged in. Seem to get a connection with the green light, but it's so loose any nudge to the cable will see the head drop off...
Mine is a MY18 model one without the ESC off button, although I won't suspect it, but could the plastic trim be different from the MY17 cars? Any photos of their OBD port would be much appreciated! :)
**Edit** Got it!