Unrelated to the UsedCarKing.com makeover, but, interesting research anyways...
My son and I have been trying to break into Google PPC image ads and working the Google Merchant Store too.
Screenshots below and my findings at bottom.
Example of Google image ads and Google merchant ALMOST in our space.
I have found that Google slowly builds out the reach of the image ads & merchant center on a marketplace by marketplace basis. Google has to have ALL of the product attributes (aka features) of all of the manuf'ers all line up so they can be cross shopped.
We've taken our inventory export feed and uploaded it to our google merchant store:
Tied our merchant store to our PPC account and... NOTHING >:-/
I have found that Google slowly builds out the reach of the image ads & merchant center on a marketplace by marketplace basis. Google has to have ALL of the product attributes (aka features) of all of the manuf'ers all line up so they can be cross shopped.
Google uses 3rd parties to establish and manage these attributes, our vertical is yet to be discovered. I've had talks with the VP of a big player in this space, we deep dived our products, traced it all back to the source and they couldn't make any money on us, so they've shelved us.
We are very close to this being a NEW opportunity for all of us. I see all the connections needed, There is one company that can pull this all together and make this happen... if only they had me on their consultants payroll, they'd see the light! 
p.s. why am I not surprised that the boys at eBiz are hard at work in this space? (see Audi of MV above) WTG!
