great shots of a very sweet car (is it yours? if so, feel free to send it over my way ).
My only critique would be of the first one, I like the shot, but it seems that with a car shot, inculding the front logo is a big plus, but you chopped it off (though it still is distinctly bmw because of the grill). I just think it would pop out more if a bit more of the car were included.
Your high contrast look works for me in each of these photo but Photo 1. In that one I find the sky eye-hurtingly blown... and I just don't want my eyes to hurt when I look at a picture ... the others are quite good, though, and the effect works all right.