WARNING: This page is about a different car, the 2011 BMW M3, 2010 BMW M3, 2009 BMW M3, and 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
Support transmission with special tools 234050 and 002030.
IMPORTANT:
Transmission must be secured with tensioning strap (1).
Fig 1: Supporting Transmission With Special Tools (23 4 050, 00 2 030)