My understanding is that if you buy.. anything.. for an intended purpose and the seller is aware of this...he is then liable if the item cannot for full this purpose.You would need to consult a solicitor to make sure of your rights.The dealer should be bending over backwards to make sure you are fully satisfied as his rep is on the line and the import game is not that big that he can afford to get such basic stuff wrong.I bought my RS4 sight unseen and would have been mighty pissed If I had got a RWD..Although some guys like the RWD gig...if you wanted a 4WD and it was clear that the dealer knew this...(written of not) I would be pursuing a resolution.Figure out what YOU want and remember to deal with the dealer in a calm but decisive manner.
Hope it all works out for you.