In your case what I would have done is ask BMW to falsh the DME with the latest software regardless if you have it or not.
They have a cause so I dont see what they wouldnt do it for you being that a known problem exist.
AP-V3 & Cobb Protuned by PTF: (New Times Coming Soon)
RENNtech Tuning: 11.78 ET @ 116 Mph in 1/4 mile YouTube
Dinan Stage 3: 12.5 ET (Best) 111 Mph (Best) in 1/4 mile