Check out some of the recent european delivery discussion threads on M5POST and F30POST:
http://f10.m5post.com/forums/forumdisplay.php?f=424
http://www.f30post.com/forums/forumdisplay.php?f=383
And yep, there's a break in period (2 stages) for the M6:
First is from 0 to 2000 km:
- Avoid using "kickdown" (don't floor the pedal)
- Do not exceed 5500 RPM
- Avoid exceeding 160 km/h (no high speeds)
- Drive at varying speeds
Second is from 2000 to 5000 km:
- Only use "kickdown" when overtaking is needed and for a short time
- Don't exceed 250 km/h