It doesn't take 100 hours, it takes less I have taken out the last 103 US-cars VT47780-VT47882 it toke 37min (around 40 hours then) so I suggest that what "we" do that to know exactly how many were built in each color, country-version, equipment level etc.
From the last 103st the following information can be read;
300 Alpinweiss III; 28st
475 Black Sapphire; 27st
B44 Valencia Orange; 48st
L838 Canada-version; 51st (= 52 are USA-version)
S609 Navigation; 80st
S507 PDC rear; 80st
S494 Heated seats; 91st
The fastest source is through BMWs ASAP system
http://www.bmw.de/de/de/owners/parts...catalogue.html but
www.bmwvin.com and
http://www.rubmw.ru/vincode/eng/ can also be used (takes more time than BMWs since you have to press in a code or a math quest).
Regards Stephan