Looks pretty decent. Could use more reflections (on the body and windows) as is, it seems a bit flat and cartoonish in places. The darker the gloss color the more you will see in the reflections. Like your windows for instance...depending on the angle a window that dark would nearly reflect like a mirror. I would suggest referring to similar colored cars with similar lighting and see what you find.
Aside from those couple things, color looks okay, and I like what you did with the lines of the car
Here's an example of what I meant...red car with darker windows..notice how much detail is in the reflections...this is what you need to make the car look more realistic and glossy.
