To add to the good suggestions already given, you should begin a regularly updated blog on your website. You could talk about new models, warranty questions, reliability awards and much more.
This content will likely be keyword rich and will greatly help with your Google ranking. Be sure also to include nice pics with every post. They're a lot more visually-appealing than plain text alone.
If you're interested in
SEO changes that you can likely make yourself, check out
Your Website: The Taj Mahal Nobody Knows About.