Couple of questions for you.
Do you have pre facelift or facelift mirrors?
Are you using the A6 mirror base with the cut out for the factory LEDs?
Does the factory led unit fit without modifications to the internal structure?
Looks like the voltage converter. Any part numbers you can make out? Might have to remove the cover first.
Ive also seen the low battery it will charge while driving warning. I checked my battery with VCDS and the AH capacity was down to 30, way short of what it should be. The battery is 7 years old though.
re battery coding the recommendation is to change the battery serial number by 1 digit. New...
Thank you for the feedback, I took some readings with VCDS, the 33Ah looks far too low in group 20, combined with 60% battery ageing. This looks rather terminal.... I'll put the CTEK charger on the battery when it stops raining and see what that reports. Will post back for everyone information.
This might help. My car is a 2014 facelift and the battery is coded via the CAN Gateway over CAN with the long adaptation option. There is a video to guide you through the process for each of the 3 possible methods.