indeed it is true to BMW Australia:
http://bmw.com.au/com/en/insights/Pr...360+Event_1%2E
fine print:
Offer applies at participating BMW Dealers while stocks last on new BMW vehicles ordered and delivered between 1 September and 31 October 2012 and cannot be combined with any other offer.
So pretty much means: "buy a car we have in stock and you can enjoy this offer... place a factory order and you'll miss out"