Not sure why there has been so much dialog on how BMW doesn't recommend /enforce changing the automatic transmission fluid (ATF), and deem it a "life time" fluid. My 2003 service manual clearly states the following (on the same page):
Brake Fluid - Every 2 years
Coolant - Every 4 years
ATF (automatic transmission fluid!) - Every 100,000 miles
Does no one have this in their manuals?