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How to Remove the AdBlue Warning Light in the Audi A6?

Model: Audi A6 C7, MK 4 - Years 2011-2018
Part: AdBlue warning light

If the AdBlue warning light has turned on in your Audi A6, it means that the emissions fluid has reached a too low level and needs to be topped off. This is a fairly simple operation; let's see how to proceed in this short tutorial. First, obtain a 2.6-gallon container of fluid, available at any auto parts store. Then, open the fuel door and, using a 17mm socket wrench, unscrew the small black cap located on the right. Finally, insert the container's nozzle into the opening, add the necessary amount of fluid, and tighten the cap.

Updated on 18 July 2026 by ScegliAuto

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