Originally Posted by Munit
All years of the US m3's had "brake regeneration " thing with the alternator disconnecting during acceleration. All A/C systems in bmw's and most late model cars have an A/C clutch that disengages under heavy throttle.
Here are a few discussions on this topic (there are more).
Here is another link
with almost direct evidence.
is a source also claiming no BER in the US.
In short, after reviewing all of the posts here and on other sites I would say that all NA model years of the M3 having BOTH features (AC and Alternator disengaging at high or WOT) is very debatable. It would be great to put this one to bed.