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How to refill the AdBlue tank in the Citroen C5

Model: Citroen C5 MK 2, RD, X7 - Years 2008-2017
Part: Diesel particulate filter

In this tutorial, you will learn how to refill the AdBlue tank, necessary for trapping particulate matter in the DPF; topping up is required when the error message appears. The tank is located on the left side of the vehicle, near the rear axle and to the left of the exhaust system. To access it, remove a plastic cover. Once exposed, use pliers to disconnect the quick-release hose connected to the small tank. With the new product package, which also includes the hose with tap and connector, connect the tubing fixed to the vehicle and allow the product to flow by gravity. After topping up, reposition the hose, clean any spilled product with a spray cleaner, and reattach the plastic cover of the underbody.

Updated on 4 May 2026 by ScegliAuto

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