Ever hear of Road and Travel Magazine?
Targeting "upscale consumers with a slant towards women", this online weekly magazine brings together everything women would want to know about traveling--and cars.
From car care and maintenance tips to insurance and accident advice, they have pulled together a pretty good amount of content. (As a side note, who ever, ever, ever thought that a good title for the insurance and accident section was auto oopsies? Any accident I have ever been in did not feel like an "oopsie"--besides, I doubt that the upscale readers they are aiming for are age two and under, and thus prone to "oopsies" of all sorts. But I digress...)
Anyhow, shop owners, I wanted to cite this website because they have a specific audience in mind and have developed content aimed at them.
Imagine what your website could offer people in terms of helpful content. You could market, for example, to new parents with information about car seat fittings (and clinics onsite at your shop), top kid road trip music, links to information on kid-safe cars, car games and more. The cool thing about the web is that you could link to content rather than trying to develop it all yourself.
You could flesh out your links section by category and link to pages underneath it. That way you provide great information, in an ethical way, but without the burden of it costing you anything more than time to find the links (and ask if it's okay to link to your site).
As another added bonus, having links on your website helps boost it in the search engine rankings. Just a hint.