Hi all, I need to code in my single Xenons i bought from ebay to my audi a3 2004 they are all fitted and sorted and work just need to code them in and make the dash warning light go away. I understand i have to go into to 09, CE module, and check on byte 21. Firstly the bytes did not go that far thus i entered 00 untill it go to byte 21 and selected the option on xenons from the drop down menu and copied the long code and when i tried to enter this back on to it did not allow me too save the code. Are the options different on an 2004 A3? Thanks in advance