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Frequently asked questions about cars and motorcycles

How to Fix the AdBlue Level Error on a Mercedes GLC

Model: Mercedes Glc C253, X253, MK 1 - Years 2015-2022
Part: AdBlue warning light

In this video, you will learn how to fix AdBlue level errors. In this case, it is on a Mercedes GLC, but since it involves removing and cleaning the injection nozzle, this video is suitable for anyone who wants to try this operation on their vehicle. The dashboard displays an error message regarding AdBlue, indicating that the liquid level measurement is not possible. This means that the dosing nozzle has a problem because it is clogged with crystallized urea. First, lift the vehicle and remove the engine cover, which is held in place by several screws. Locate the nozzle and check how dirty it is. Simply immerse it in very hot water, which completely dissolves the crystallization. Make sure it is also clean inside. Naturally, the filler neck must also be cleaned with hot water. Reassemble everything and put the skid plate back in place. The problem is solved.

Updated on 28 July 2026 by ScegliAuto

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