Probably has already been seen by the readers of this forum but if not, I came across this while I was trolling around the web to get some more info on the N55 motor motivating our 35 X3's and thought someone may also take an interest in it:
http://www.bawarec.ru/manuals/3er/e9...3er-e90-21.pdf
Kinda neat reading for gearhead nerds like myself. The only area that appears to diverge from our setups is the exhaust system after the cat. Some key pieces that caught my eye were the tech that was implemented to prolong engine oil life (perhaps justifying the 15K oil change intervals?) and the very intimate look into the twin scroll turbocharger...