Transmission on 2002 E430

  mercedes/e-class/1996-2003

I still have an unresolved issue with my transmission. No gears are engaging. The common fault is the conductor plate valve body after changing the floor shifter. I looked at the U tube video and conclude that as long as the bolts holding the oil pan on come off without a fight then the job is doable for a beginner.
I am concerned that the shifter and conductor plate needed to be changed at the same time. without the 13 pin plug not leaking as expected. I'm going to drain the transmission oil and see if the pan can be removed without braking parts.
Any advice would be welcome.

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