Its not the reflections here, look at the other cars, the reflections are barely visible in any of them.

As already stated there are tweaks needed ie: glass on the beetle is very dark, and the rims need some higher specular even though they are alloys.

What doesnt sit right is the perspective. I feel you are in need of putting the lens up to a higher setting, perhaps a 40- 45 is a good start. If you look at the front wheel on the Redder Car its almost the same size as the rear, suggesting a bigger lens, look at the beetle even though its a little further away the perspective is greater from the front wheels to the rear again making the lens too small.

Crack the lens setting, adjust the glass and rims ,you are done!! Good job overall dude.

Cheers
Jay