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How to Reset the AdBlue Warning Light on the Mercedes G-Class?

Model: Mercedes Classe G W4631st - Years 1989-2018
Part: AdBlue warning light

If the AdBlue warning light is on in the instrument cluster of your Mercedes G-Class, it means that the fluid in the emissions system has reached the minimum level 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 2.6-gallon jug of urea, then ensure the engine is off and open the fuel door. Next, unscrew the blue cap, insert the supplied hose from the jug into the opening, and add the necessary amount of fluid to reach the maximum level.

Posted on 20 August 2026 by ScegliAuto

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