Sorry to hear that. Did you get any messages/warnings - like SRS malfunction etc? I'd vote for BMW shop, as there could be non-body problems for which they might need to use BMW shop expertise (i.e. resetting codes etc) - my wife's 335 was rear-ended recently, the headrests poped up, and BMW service had to reset all computers IN ADDITION to body work.

__________________
His : 2013 X5 3.5d Deep Sea Blue/Black/Aluminum with ALL packages, 20" 214"s, running boards, Adaptive Drive, Spare Tire, BMW Apps
On Order : 2016 X3 3.5 MSport Silver/Mocha with DHP, CW, Prem, Tech, DA, Lighting

Hers : 2015 328xi MSport Silver/Red

Prior:
2008 X5 4.8
2011 X5 3.5d
2010 335 xDrive
2013 335 xDrive