stop down your aperture a little to get more of the car in focus, try around f8 or so. if you need more light, try bumping up the ISO a little or shooting in some more light.
if you have a circular polarizer you can adjust it to alter and remove the reflections off things like the windshield.
I agree the location could be better, judging from your info, you're on the eastern side of Japan, I'm not too familiar with your area, but if you're near a good beach or something, that might be an attractive option.