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How to Reset the AdBlue Warning Light in a Mercedes S-Class?

Model: Mercedes Classe S W221, MK 5 - Years: 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
Part: AdBlue warning light

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Video tutorial

If the AdBlue warning light is on in the instrument cluster of your Mercedes S-Class, it means that the fluid level in the emissions system has reached the minimum and needs to be topped off. This is a very simple and quick operation; let's see how to proceed in this tutorial.

First, purchase a jug of urea from any auto parts store, then turn off the engine and open the trunk.

Next, lift the floor panel, remove the spare tire, and unscrew the indicated blue cap. At this point, insert the jug's nozzle into the opening and pour in the necessary amount of fluid.


Updated on 2 October 2026 by ScegliAuto


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