FYI i just did the transmission fluid and filter in my 235. I used Liquid Moly's Top Tec ATF 1800 fluid.
https://products.liqui-moly.com/top-tec-atf-1800-2.html
"Developed for ZF 6HP19/26/32 and ZF 8HP 45/55/70/90 type automatic transmissions that are installed in various Audi, BMW, Jaguar, Land Rover, Porsche, etc. vehicles."
Certified BMW Approvals,
BMW 83 22 2 305 396
BMW 83 22 2 305 397
BMW 83 22 2 152 426
BMW 83 22 0 142 516
BMW 83 22 2 289 720
BMW M-1375.4