After demount of the "oelwanne" I changed the filter and cleaned the magnet. Assembly again. I deatached one rubber hoses on the bottom of the ATM cooler. Atached a hoses to a 5 liter can of ATM oil, see photo. Old oil from oil cooler hose running down under the car to a 10 liter empty bucket. New oil from hose down in oelwanne through the oil messure stick hole. Same amount pured in as was pured out while engine was running and in D (drive) to flush the converter and filling it at the same time.
It worked just like a professional ATM flushing machine.