Hi, have a cl55 in workshop with delay into reverve and drive, 3-4 second delay. Also 4-3 downshift sometimes neutralising uder hard acceleration. Rebuilt transmission. Renewed frictions, recondition torque convertor and renewed valve body. Inspected B2 and B3 pistons for cracks, no damage found. Checked B3 and B2 with air all ok. Swapped transmission control unit out of my Cl55 into another CL55 .no fault. Can anyone give me any help.