re: Google Places Dup Page
You do have your dealer name "trademarked" right? File a Digital Millennium Copyright Act (DMCA) notice with Google for the places page that you want taken down. (FYI - you can also do this with Facebook, or any other site). Funny that it would have to go this far, the last time I had a duplicate page problem with places... I just sent a nice email (logged in as the places owner) using the help button at the bottom of the places page (link is no longer there on new design). Page was removed in 3 days.
And lastly... YOU do control the DNS for your domain right? If you don't, you should, don't ever let a vender control your DNS. You can always temp point the domain to your main site. So the OEM site will point to your required site. Hold it hostage until the vendor fixes the problem (gives you the password or deletes the page). You may get ALOT of FLACK form the OEM. But at least they will pay attention. Again, YMMV - and this would be a ballsy move. (Something that I like to do!)