OEM Reference # 725 589 00 90 00
# 725 589 02 90 00
Refilling transmission fluid on a 725.0 (2015+) transmission requires this tool to be inserted first as there are no threads on transmission drain nut. Insert this tool first, then use regular MB transmission refill adapter to complete task.
Optional adapter link
https://www.toronto-tools.com/collections/mercedes-benz/products/automatic-transmission-refill-adapters-euro