I thought I've read that the MTF-LT2 is for M cars, while LT3 is for newer non-M BMW's. People on M3forum swear by the E46M needing the LT2.
I called a few dealers today to get a price quote on the LT2; none of them has it in stock. 1 dealer claimed that LT3 has superseded LT2. I checked realoem.com and sure enough it's saying the same thing.
http://www.realoem.com/bmw/showparts...18&hg=23&fg=05
Is there any official BMW service bulletin that says the LT3 is now the official fluid for the Z4M?