My girlfreind is a car sales man for a local VW dealership here. Shes been working there 6 years now, and she said that on they new cars they only mark them up $300 over what the dealership has in them. She says most of the time they will knock the $300 off the car and throw in window tint or some kind of deal like free oil changes or car washes for a year.
she said the dealship looses money on every new car they sell, but make a killing on selling the used (trade in) car.
Idk if thats much help to ya or not.