This background is extremely cool. I think the car is too bright for it though and I think the paint would reflect a lot more. Also maybe you don't have to post the full 4279x2547 image. It reveals some blurry areas especially around the rear and some bad selections. I also think the tail lights are too pretty to just be blacked out like that.
Oh and also you should add some yellow to the white car that's reflecting on the asphalt.
