Hey, i have a 1999 A4 that I want to do an HID conversion to. I have the first 99 that did not come with projector headlamps. I am about to purchase a kit and was wondering if anyone has done this conversion for my model and had any problems with headlight sensor. I'm not sure if I need the error code eliminator adapter if I were to do the conversion. Any suggestions or answers would be much appreciated.