Battery was replaced with a Yuasa unit around 3 months ago due to the old one dying from being stood around too long, so shouldnt be that.
Autoscan below:
Chassis Type: 8E - Audi A4 B6
Scan: 01,02,03,08,09,15,16,17,26,36,37,45,46,55,56,63,76
Address 08...