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Why is the AdBlue light on in the Mercedes S-Class and how to turn it off?

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 light is on in your Mercedes S-Class, it means the emissions fluid is at a too low level and needs to be refilled. Once you do this and drive a few miles, the light will turn off by itself.

To refill, simply follow the procedure shown in this tutorial. First, get a container of fluid, 2.6 gallons if the tank is completely empty, then open the trunk and remove the floor panel.

Next, remove the large blue cap, unscrew the secondary cap, and pour the necessary amount of fluid into the hole to reach the maximum level.


Updated on 27 August 2026 by ScegliAuto


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How to Remove the Rear Seat of a Hyundai Tucson?

To remove the rear seat of a Hyundai Tucson, follow these steps. Start by moving the front seats to their most forward position to gain space. Next, locate the release lever on the underside of the rear seat, near the floor. Press this lever down while pulling the seat upwards to unlock it from the anchor pins. Once unlocked, tilt the seat upwards and forwards to remove it from its position. Repeat this process for both sides of the rear seat. Be careful of any electrical cables or components that may be connected to the seat during removal. Once the rear seat is removed, the disassembly is complete.

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by ScegliAuto

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