I don't like taking this shot in a parking lot. You are getting all kinds of weird lighting highlights and reflections from other cars. In the first picture, the white car reflection and hotspot above it are very distracting. The people standing around on the right should be asked to move or cropped out. The right front tired is cut off at a weird spot, I'd take the shot/crop to include the whole tire.
#2 - I don't like the two cars on the side, the guy walking through the shot, the curb in front of the car, the picture needs to be straightened, and the hood of the car looks dirty.
For these shots to be good, I think you would have to be in a little more control of the environment. Park the car in a move evenly lit area without all of the junk around. The amount of light isn't real important in this kind of shot, since you are going to be using a long exposure anyway, on a tripod.