I thought for sure that was the cause of the issue but nope. Mercedes Intelligent Servo Module (ISM) was installed in 2005, and newer vehicles are equipped with the 7G Tronic Transmission (Code: 722. All internal plastics looked good and moved freely. Side note: I recently pulled the manifold to replace the broken plastic swirl flap lever that commonly fails with a metal one. The 722.9 7G-Tronic lawsuit alleges the transmissions were defective from the time they were built due to defects in the valve bodies and conductor plates that caused the transmissions to fail. Since I am getting the code I will drop the valve body and check the valves for any clogging before coming to any other conclusions. The trans is not slipping (rpms are not increasing) but my scanner can show live data and indicates the torque converter is slipping but maybe that's normal up to a certain point.

It accelerates fine then struggles to gain any more speed. Mercedes-Benz 722.9 7G-Tronic Transmission The problematic 7G-Tronic transmission was used in the 2004 E-Class E350 and SLK-Class R1 CLS550, R-Class W251, and M-Class W164 and the 2006 G-Class X164. The issue is total lack of throttle response (its intermittent so sometimes) usually after 40 mph. Click to expand.Great to know thanks! I want to share a little more info and get your thoughts as I do have a drivability issue with the car for some time and the TCC lockup error is the only code that is present so I'm thinking it has to be the cause but I'm not entirely certain. As usual, the simplest things can lead to major problems in the 722.9.

Gear shift module mercedes 722.9