I'm sure there is no shortage of information out there about replacing the pilot bushing(connector) on the conductor plate (electro-hydraulic control unit). But, please remember the 7mm bolt that holds the connector in has a torque spec of (I believe) 2 Nm. It is imperative that you don't over-torque it. Snug is more than enough. Anything more than snug and you'll pull the brass insert out of the conductor plate ($400) and 2-3 hours of labor. I speak from experience and I am a Mercedes Benz technician. This would also be a good time to perform a transmission service if you haven't already had one done.