Did you double check the sticker under the tranny pan?
What does it say? ( color and the part number )
Mine is a green label and I used redline d4 ATF ...
Red Line Synthetic Oil - Automatic Transmission Fluids - D4 ATF
My e90 I think is compatible with redline d6...
A5S 390R (GM5)
E46
330xi from 6/00 production to present
325xiT from 9/00 production to present
E53
X5 3.0 from 8/03 production to present
E83
X3 2.5, 3.0 from 8/03 production to present
The transmission oil pan will be labeled with either Texaco ETL – 7045 or Dexron® III, please fill or top off with the proper
fluid only. Do not mix Texaco ETL – 7045 and Dexron® III fluids.
See S.I. Bulletin B 24 01 98.