Just wearing black is not gonna get you into Berghain. The main criterion is unashamed indivual expression. If you are trying to get in by wearing a uniform you're not gonna have a good time (either in the queue or the club). I've only ever been in outfits that were colourful, and weird, and me.

Beyond the outfit you are also most likely to get in if you are clearly bringing your personal uniqueness and energy to the place rather than expecting an experience, and if you show respect for the culture, everyone else present, and that you are able to handle something out of the ordinary.

Are you gonna have a good time in there and not ruin anyone else's time? You'll get in.