Happy holidays, I have been informed that all 2008 3-series have the electronic rear differential first featured on the 1-series if they have a build date "after" 03/08. The problem for me is my E92 328i has a build date of you guessed it, 03/08. I am confused by the use of the word "after' in this application. I don't know if BMW means after the month began or after the entire month was over. Though it is not an LSD, I am told it is very useable and the next best thing. Guys help me out here, how do I know I have it? Any info is welcome. Thanx.