Allstate and Progressive are the two WORST insurance companies around when it comes to making a claim. They both try to weasel there way out of buying parts and when they do they like to use aftermarket or used CRAP. I do high end collision repair for a living and can tell you that lightly damaged structural parts can and will be repaired. I have a Mercedes C-class rite now that slammed a poll in the rear door so hard it pushed the "B" pillar in 6mm...............I am repairing it via Cellette frame rack and laser measuring system. The car will be 100% reliable and safe when finished. I cannot speak for the shop you car is at though, but I can almost guarantee your car won't be fixed on a cellette frame rack(which it could since it has M-B unibody).