Well, taking my '04 545i in tomorrow for the same issues listed here: the slam when coming to a stop, stagnation in switching gears around 40mph, and also a leak from what appears to be the transmission, judging by the location on the garage floor.
I am going to print out some of the posts from this thread, and provide it to my SA. I will post what happens. I pray they just replace the Mechatonics unit, or whatever is wrong with it, on the first attempt to resolve the issue. I have about 68,000 miles on the car, and have a thrid-party warranty. I want BMW to pay the whole bill though.
Anything else I should know or note, as I take the vehicle in?