Sorry to hear about your troubles, but I have selfish reasons for posting
Since your bumper and tail light are practically off, and since you said you would post pictures...can you PLEASE do so?
I still need to replace my tail light (see another thread) and have the replacement part in my hands. It seems SOOOOO easy to get the tail light off, but that dreaded retainer clip holds it in place.
I'm not planning to have the dealer install the tail light until my 5000 mile service.
In the meantime, I actually attempted to take off bumper (seems REALLY easy, but I can't do it). The bumper has 2 screws on the bottom facing the roadway, and some easy to remove plastic clips. Also, it has two screws on the rear facing the back of the car (you can only see them if the trunk is open and you pop open the plastic covers that face the rear of the car). After taking all of this off, the bumper is still solid in place.
So it would be nice to know how to finish removing the bumper. Perhaps with your bumper torn off you can see where the other connectors are hiding.
Also, if you can take a picture of the retainer clip I'd appreciate it. I can see it through the space between the bumper and the tail light, and I can see the slot on the replacement light. I was trying to find a way I could possibly stick something between into that slot without taking the bumper off.
I'm soooo close....