What Causes Jerking in Mercedes-Benz 7-Speed Transmission?

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Transmission jerking can generally be attributed to four main causes: 1. Solenoid valve issues: The solenoid valve contains a small valve core that operates via electrical current, similar to the working valve in the valve body. This can lead to unstable oil pressure regulation and uneven shifting. 2. The vehicle's computer has a self-learning function for driving habits, but this doesn't always result in jerking. This situation is relatively rare, and usually, resetting the learning values can resolve it. 3. Internal valve body obstruction: The valve body has very high requirements for its working environment. Even minor contaminants, including fine powder, can affect the smooth operation of the shift valves inside the valve body. 4. Poor piston return in the transmission can also cause jerking (this is less common and typically an intermittent issue).