Sorry about the accident.

Our 15 X5 got rear ended by unsinured a few months ago, the damage was similar as yours except our E70 has hitch.

BMW dealership didn't really do repairs, they only sell cars, but they have partnership with some body shop "approved" by BMW, any way, our car is done well, but it's costy, the total repair bill ended up $7000+, fortunately our insurance took care of it and we paid $100 deductible.

__________________
2012 X5 35i: Hitch installed; Coded;