I made an amendment to my order yesterday and before signing the amnded order I checked it line by line against the original to make sure nothing had changed that shouldn't have changed. The only thing that caught my eye was that the literal description against 5A2 had dropped the word adaptive and just said LED headlights. The price hadn't changed so it looks to me like the adaptive LED headlights were only ever LED headlights.
I haven't checked the small print but I should have expected that the order would be the contractually binding legal document, so that whilst there are get-outs for errors in the brochure and web site BMW need to get the order right and have amended it. If so I'm surprised that they haven't also changed it to say 'LED dipped headlights'.
Anyway, if I'm right, having signed an amended order form I will no longer have any comeback if the LEDs are not adaptive.