Okay guys, just picked up an 08' MKX. I got it with the intention of putting HID on it. I have only found one person who did this to a MKX and he basically said when he unlocks the car, and the headlights come on, he had to turn the headlight switch to the on position before the headlights went off or the headlights would flicker and go out. Then they would not turn on again. But if he did it before they went out, they worked fine. After reading your posts, obviously a HID install is possible, but is there anything besides the ballast, igniter, and what would come with a higher end kit that is needed? What about a relay? Please someone who knows what they are talking about clue me in a little. The only lead I had was maybe the battery needed disconnected to reset the perimeter lighting? Did you connect to the battery itself? Where did you ground? Any help and or pics would be the biggest help. After 3 Lincolns with HID I want this one to be the best it can be as well. Also if someone tells me how, I'll post pics. If everything works out, before and after pics of the install.