I think it's ok. But you will have to study and try to make some tests to see if placing them upper/lower in the articles generates more clicks.
The adsense is placed very good and the car related sites will bring you a lot of adsense earnings (i know because i had a couple). The only thing to keep in mind is to make a good SEO and to promote it as well as you can. Good luck with your new site.
Except for the top of the page AdSense link unit your ad placement is good; you could optimize that by lowering it under your links to categories. good luck
good ad placement, the site is a bit busy on the right hand side, but overall i like the site and url.
Looks good, you may want to change one (or more) of the ad units to display images, sometimes on specific niches the CTR is much better than plain 'ol text ads.