Last Updated on February 13, 2020 by Christ

How To Reset Mercedes-Benz W221 Automatic Transmission – The W221 is the name of a luxury car produced from 2005 to 2013 by Mercedes-Benz and which represents the S-Class range of the German House. In general, the line of the new flagship Mercedes-Benz is more ostentatious than the soft and sober of the previous S-Class, the W220. The front is characterized by the large typical of automobiles Mercedes grille, the sides of which are optical assemblies large and the angular and curvilinear design externally in the inner area.

At its debut, the W221 was envisaged in only two engines, both gasoline: S350, equipped with 3.5-liter V2 M272 and 272 hp; S500, known as the S550 in the US and equipped by the most powerful 5.5-liter V8 M273 and 388 hp. Both engines are equipped with 7-speed automatic-sequential 7G-Tronic transmission and also 4ETS traction control is present. The range, narrow at the time of the model’s debut, was expanded in 2006 with the appearance of other engines.

How To Reset Mercedes-Benz W221 Automatic Transmission

If your transmission changes gear when not expected you should reset it. This procedure should help if your transmission shifts randomly or jerks, or if you are experiencing random downshifts or upshifts.

Method 1:

• Make sure the vehicle is at a complete stop
• Switch ON the ignition, but don’t start the engine
• Press the gas pedal to the floor and hold for not less than 30 seconds
• Release the accelerator pedal
• Start the car and drive.

Method 2:

For more details, please watch the following video:

This tutorial is based on the Mercedes-Benz repair manual. This reset procedure works on automatic transmission only and applies to Mercedes-Benz W221 (2006 2007 2008 2009 2010 2011 2012 2013 model years) that comes with the 5-speed 722.6 and 7 -speed 722.9 (V12 Models only). Hopefully, the article of How To Reset Mercedes-Benz W221 Automatic Transmission useful for you.