Does anyone know which A6 Models on the 2001 range come with XENON headlights? What is the difference bewtween the connections on a XENON bulb to a standard 3 pin (H7) bulb? Is it possibly to upgrade to XENON headlights? My lights are WEE POOR. upgraded them to 40% brighter bulbs but again not brilliant. I like the 'electric white/blue' lights that alot of TT's etc have?