Yes I did, both the filter and the fluid. I never touched the control plate, I assume you mean conductor? Did they replace the filler cap for the trans? They could have used the wrong fluid. I replaced mine with the Valvoline fluid that was MB 236.10 spec with a drive works filter. Took about 4 quarts of fluid during the change.

To clarify your car acts funny when shifting right? Like it shifts normally but it feels like the car vibrates and hits during a shift?