I am all for HID lights, but in the correct housings. I fitted some to my previous A3 in projectors with a good cut off, HIDs in reflectors are just inconsiderate to oncoming traffic and will get melted by my OEM HIDs on main beam in my A4 when I come across them and six spotlights if I am in my Land Rover. Please fit them in projectors if you want HID. There are lots of threads on here about fitting projectors in halogen housings if OEM is not the way you want to go, error canceling kits for canbus should be ok too.