I like the dramatic angle and all the empty space available for text. Unfortunately, the license plate is the dominant element with the grass coming in second so the car rates third. Some desaturating and maybe blurring might be in order to focus attention on the product. [I do question the "you can park in a field" message as a selling point, however.]

What you can do is darken the license plate and grass. If you have photoshop you could use the burn tool. That would draw less attention to them.

I believe the burn tool is a no-no, because it is only working on one area of the entry, not on the total image. I might be wrong.

I admit I don't know all the rules for this contest, but it's naive to think that commercial photographs aren't Photoshopped. If the objective here is to create a photo that could be Photoshopped into a compelling ad, I think this passes the test.

just like you would see as an ad on a bil board!! nice work

You could just take the license plate off the car for the shot if it was an issue.