every curve on avenger is too shallow, no real form to it, the hood is waaaaaaaaaay too flat, no definition on the sides, still no shading on the frame or windshield (Why?), the tread on the tires is project from view, and none of the materials really match up either, so there's a really disjointed thing going on where everything looks a bit different
And simply adding shadeless does not a headlight make.
I've got an overbright material for max-d that'll get somewhat good looking lights though, so you can have that when it's finished