How to Refill the AdBlue in the Audi A4 Avant

To refill the AdBlue in the Audi A4 Avant, start by taking the owner's manual and checking the type of AdBlue suitable for your vehicle. Go to the back of the car; open the trunk; remove the trunk floor (the one above the spare tire); take out the spare tire; grab the wrench to loosen the wheel nuts, open the refill flap, and unscrew the AdBlue filler cap. Once the cap is off, insert the funnel provided with the AdBlue container into the container itself, and as shown in the video, extend the funnel.

Protect the bodywork with some rags secured with tape to catch any potential spills that could damage it. Always keep a soaked cloth handy, as if any AdBlue spills, you can immediately clean it up. Now take the AdBlue container, insert the funnel into the AdBlue neck all the way down, and pour the liquid slowly (to avoid air bubbles).

After pouring all the liquid, carefully remove the funnel from the neck without spilling any AdBlue; remove the bodywork protection; clean the refill area with the soaked cloth in case any liquid has spilled; screw the cap back on and tighten it with the wheel nut wrench (do not overtighten the cap as it is plastic and may break), then close the refill flap.

At this point, you can place the wrench back in its spot, reposition the spare tire, tighten its support, replace the floor above the spare tire, and finally close the trunk.