Hi I saw on the other a1 forum (co.uk) that you are a vcds specialist :) I need your help :) I've retrofitted my a1 with the bi xenon headlights, and after coding in cds they work ok, but the led's do not work. I suppose i have to change something in byte 18... but i dont know what... My code is 86000A2FA0051800201840E02100894C477F6C0A00EF5D22E40887870041 72/73 does not work. The leds work ok, but taillights don't. Probably because I have the normal bulb taillights. Any ideas? Maybe you have the descriptions to the bits? BTW, is the a1 forum co.uk only restricted to UK citizens? I couldn't register there :(