🥃 Audi A6 2015 Adblue Capacity

Adblue message won't go away. I received the Adblue refill message on my 2012 Q7 a few days ago. I bought the VW/Audi fluid so that I could twist it, then I cut a hole in it and filled it with about 6 gallons of DEF fluid. I've driven it a lot and the message is not going away. I read something about an older software version needing the dealer My Audi A4 B8 2.0tdi 2015 has decided to display the dreaded spanner warning light saying adblue system fault when I was cruising on the motorway. I have run a scan for errors several times but no fault found. I have taken it to two garages (not Audi) but they have run diagnostics test too but can’t find any errors. .

audi a6 2015 adblue capacity