722.6 Transmission Jerks at Slower Acceleration When Shifting

[MS420]

im having issue with w211 e220 2004 722.6 shifting when cold sometimes it shifts first gear nice sometimes it jerks if the car stays for a few days , first 2 shifts are more harsh than others and there is rpm drop when it jerks you can hear like a vibrating or rumbling noise from the transmission when it jerks and when stopping its vibrating when its cold oil, the rumbling noise happens always at 37-38km/h when the oil is cold then i thought my motor mounts are bad which they were changed them but there is still vibration from transmission when i let go of the gas and rumbling noise so now i know its from transmission seems like there is not enough oil providing when cold i changed oil and filter its good i changed also the pwm solenoid which made transmission shift better but still not as good as it should what should i check next?