Panda, heres what I've done to your images.
Just a reduction in brightness, and an increase in contrast (to get your whites whiters and blacks blacker) Then pumped up saturation.
I was trying to get the gold light in the background and bronze on the car more saturated. You lose a bit of detail across the front of the vehicle, but nothing that really added to the picture. (IMHO).
I was hoping to get the background darker in this, and the car whiter. I pumped the saturation to get the bright blue in the headlights to come out more.
If you don't like what I've done, let me know and I'll remove the links.
Cheers.