Okay, seems like a lot of people in this thread didn't really read the OP, which asked for advice not on how to change the car, but how to market it -- and not how to market it to people like us, but marketing it to the sort of people who really deeply have nothing in common with those of us on this forum.
I think the demographic groups in question are the snooty import crowd and the ghetto crowd. Sorry to put that in such offensive plain english, I don't know the proper marketing terms for them.
I say, more
product placement. Have it win in the next "Fast & Furious" movie. Get Akon and 50 Cent to bling them out and show it in their videos. That sort of stuff might work pretty well for the ghetto folks, and should work really well for the wannabe-ghetto white suburbanite kids (especially those whose parents fondly remember their Camaros).
Also, since the car will sell itself so well once you convince people to step into the showroom, it should compete well for the snooty import crowd simply by playing their own game. Some copycat marketing, imitating BMW's marketing, ought to be enough to draw in some curious folks. Talk about the things that are important to them -- modern suspension, upscale interior. I think these sort of people also put a lot of stock in what magazines say, so make sure that Car & Driver/Motor Trend/whatever gives a good report.
Those are my thoughts, for the moment, in glorious offensive disrespectful plain english.