That drivability problem was valve body related in the early valve body, pre 2000/ 722.6 transmissions. I am not sure if MB can check the VIN for any updates that were done to that car. If it’s an early VB, You need an update one and soft ware flash to the TCM. Resetting the additives may cure some of the harshness, but then you have to do a 1 hour adaptation drive cycle. ZF are weak transmissions, they can’t handle hi torque loads.