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I like the styling of the letters, but it would be my personal inclination to try letters that aren't so tall. At least to see how it looks.
Also, I like the idea of moving the words up into the car shape.
How would this look if it were used on a letterhead? Would the background be white? Then, would the logo still have the same feel?
You could keep the black box behind it - Just an idea. If you did keep the black box, you could really play around with how the box crops (or doesn't crop) the car image. You could really play around with the negative space.
Overall, great colors & a good feel going on.

Thanks for the feedback. The client specially asked for a tall font. Oh well," The customer is always right" (wink, wink)