Just off the top of my head after looking at it briefly here at work... Obviously these are my opinions so take it for what it's worth...
- Home page.. I would consider making the scrolling images (which I like a lot) a bit smaller, and moving the News or About Us section to the right of it, as it is on other pages
- Re-organize the gallery by either car, exterior/interior, before/after, etc. Too busy now and everything is out of place
- For the Services page, you might want to add a 3rd option in the pull down and eliminate the actual button as a page... it took me a few minutes to actually think to click on that button because I saw it open the pull down with the 2 options, thinking nothing of it at first. Might make it easier for you to have the prices and service explanations that are on that page a bit easier to access.
- I really think that car silhouette of the car above the name does nothing, and the name/logo would look better/cleaner without it. Again, my opinion, but try it out and see what you think.
- Lastly, I don't know if the Search function is necessary...
Overall I really like the site a lot. Good work!