Incredible write-up on the fluid change! I have a 2002 330i (Steptronic) and am going to tackle this in a few weeks. I can't remember reading this, but do you have a Steptronic or Automatic and would the procedure be different? Also, can I use the Mercron on a 2002 330i? I'm sure I can since I have the ZF 5HP19 A5S 325Z Tranny.