Picking up STAR's idea, but using YOUR car ...
Now that you've got the BMW, have you thought about shooting a car wash scene? Whether it be a self service jet wash with you washing your car, an automated brush wash with you getting frisky inside, or simply a manual sponge wash at a secluded place?
I've got to admit that I'm not sure what exactly you could do to make a shoot like that unique, but I trust you on that.
Anyways, as always, it's just an idea.