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How to reset the automatic gearbox in a Mercedes M-Class?

Model: Mercedes Classe M W164 - Years: 2005, 2006, 2007, 2008, 2009, 2010, 2011
Part: Warning light – error code

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Video tutorial

In this tutorial, you will see how to reset the gearbox in a Mercedes M-Class, a very simple and quick operation to perform, for example, as a troubleshooting attempt or following a change of ownership. First, enter the cabin, then insert the key and turn on the instrument cluster.

Next, press the accelerator pedal and hold it for at least 10 seconds, then turn off the ignition. Lock and unlock the doors, release the pedal, and drive a few miles using your desired driving style.


Updated on 30 September 2026 by ScegliAuto


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by ScegliAuto

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