I am looking into doing this for my E90 M3 and had a question: After running the engine at 2k rpm for a minute, do you leave the engine running while you top off the fluid? One post states that you do, but the TIS (see below) is not clear.
Topping up transmission oil after a repair:
Stand vehicle on a level surface and secure against rolling off.
1. Open fluid adjusting screw (1). If fluid emerges, close screw again immediately
If no fluid emerges, top up until fluid emerges and close fluid adjusting screw (1) again
Note: If fluid has been replenished here, a further refill must be carried out during the actual
fluid adjustment
2. Connect diagnosis system and start service functions (drive).
3. Start engine (drive position N or P)
4. Record transmission temperature using the diagnosis system
5. (Drive position P)
6. Permissible starting temperature ≤ 32 °C
7. Idle speed: maintain at approx. 2000 rpm for 1 minute.
8. Open fluid adjusting screw (1)
9. Fill until oil emerges
Max. transmission oil temperature 40 °C
10. Insert screw
See this post also:
http://e89.zpost.com/forums/showthread.php?t=442369
Thanks for the help.
Great write up!