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How to Refill AdBlue in Diesel Vehicles

Model: Audi A4 B9 - Years 2014-2024
Part: AdBlue warning light

To refill AdBlue in your vehicle, open the flap to access the diesel fuel cap. Next to it, you will find the AdBlue tank cap, which can usually be unscrewed by hand (typically blue in color). Take the AdBlue jug (10-liter jug) and unscrew the cap. A flexible tube is provided with the jug that needs to be inserted onto the jug cap. Lift the jug and insert the flexible tube into the AdBlue fill neck, emptying its contents while being careful of potential overflow when the tank is full.

Updated on 20 June 2026 by ScegliAuto

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