Just did this harness update without any issues. The wires of interest were purple v's yellow for all the others on the sub-connector, making them easy to identify. I have an earlier rev 2 harness that also required the canbus wire update way back when. Looks like the colors have changed since then.
Present - 2011 E90 335i, Alpine White, Ivory, Sport, Premium, Steptronic
Past - 2008 E90 335i, Titanium Silver, Dakota Grey, ZSP, Steptronic, 6FL, Wagner FMIC, Bilstein B12 Pro-kit, M3 control arms, SS F/R brake lines