Audi A6 2009–2014 — technical service bulletin
Bulletin 26 13 20 2026757 · NHTSA communication 10212660 · issued Nov 15, 2013
Technical service bulletin
communication type
Electrical System
component
2009–2014
model years
10
vehicle entries
Official summary
An AdBlue message may appear in the instrument cluster either because there is a fault in the emission control system or because the system needs to be refilled. The AdBlue message displayed may vary depending on the model year of the vehicle.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.