I sincerely hope you guys that are so stuck in the SEO whirlpool are in my market area.
If you pay attention to your keyword and phrase click-throughs and conversions, dedicate yourself to being in the proper position in sponsored results (#1 is not necessarily #1), have the relevant content when that click becomes a visitor, have a mack-daddy presentation of your product, target the relevant demographic in relation to your ad/current promotion, know a smidgeon regarding internet statistics and trends, etc.... you shouldn't have a problem.
Having only been in the car business for 3 yrs (eCommerce 15 yrs) I'm simply amazed each and every day with the comments I hear from those in the car biz regarding SEM, SEO and eCommerce/eBusiness as a whole.
My opinion of most SEM and SEO companies are that they typically just throw up the keywords and phrases and set it on autorun. Paying no attention to the actual results but relying on stats spit out by software.
Look at your website statistics, referrals and keywords. Study, analyze and dissect each and every aspect of it. THAT is where you'll find out what's really going on (just before you fire your SEO/SEM vendor). You use autocount and others to determine your market areas and demographics for mailers, TV, radio and newspaper why not the internet?
SEM is exponentially more targetted than SEO or any of the traditional media options. You can highlight individual units or today's new incentives right away. Using landing pages you control in-house is critical to the use of SEM. If you decide to slash prices on old-age units you can let your market area know in moments, not months.
The bottom line is, unless you can find a legitimate SEM company to control this most critical cog of your advertising wheel, hire someone that understands it and train that person the automotive stuff.
We haven't done radio, TV or newspaper in 2 months now.
How much have you spent?