Eric, this is a great car. Brilliant detail. To get the BMW look grill you could use a black and grey hinge (2x1). I used it on a police car I made (ironically it was meant to be a Rover and not a BMW) but it did give a BMW style front end. http://www.mocpages.com/moc.php/207839
It's not the best car in the world but it kind of gives the right idea.