Right I've finished doing the test sketch. I tried doing the hatch's lights first, and it made it look like an EVO X. So I looked at the Saloon's back lights and did something combining the Saloon back lights, parts of the hatchbacks rear and the frame of the '05. It's come out alright, not as good as I hoped, but maybe someone with more experience of drawing cars could do better.
My paint skills aren't the best... I did some work to the orignal sketch.

Here's the Sedan back lights:

At the end of the day, a game is a game, so play it and have a laugh, rather then pulling out your hair out at the guy who's doing something wrong. If they fall, pick 'em up! Taking something too seriously takes away the fun, which ruins the game. ;)