My reaction is to back off the system pressure on the trans by turning the adjuster in at least a full turn. I think this might be torque related.
The adjuster is located on the left hand side, I believe of your transmission. There is a little rubber dust cap that you remove. Pull out the chrone T-handle, twist inwards to reduce pressure. Push the handle back in, replace the cap.
You can almost reach it without jacking it up, although easier with the jack.
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)