Marching in and adding links to your site to WP is certainly a bad idea, as well as being plain ethically wrong. I was thinking more of turning up to the talk page for the car article and just offering them the content, but even that probably contravenes wiki-core directive #5749327.
I mentioned it because your site seems like a genuinely good source that WP would be happy to use, making it a win-win. Don't try and use wikipedia for pagerank boys and girls.
I've always had the impression that actually being linked from wikipedia isn't necessarily a good thing SEO wise. That is I think that a long time ago google decided to penalise sites being linked from major wiki's to stop them being spammed to death.
But I'm basing that only rumour and supposition so certainly don't take it as truth.
I mentioned it because your site seems like a genuinely good source that WP would be happy to use, making it a win-win. Don't try and use wikipedia for pagerank boys and girls.