Got mildly rear-ended last weekend. Need to replace the bumper and the plastic spoiler beneath it - at the very least. Been to 1 body shop so far for an estimate which came to about ~$1200. But it's sort of open ended because they say there might be damage to parts behind the bumper. I'd like to know exactly what parts lie between the bumper and the frame of the car. Can someone recommend a manual or a link to some schematics that would show those parts clearly? Thanks.

 

Here is the picture from a sedan