Calibration of car's cameras. After a minor collision, the right side mirror of our 2019 GLC 300 dislocated. I popped it back into place. The blind side alert and the down-facing camera for the 360 degree view both work and seem to be properly aimed. Two of the body shops I have contacted state that once they remove and reinstall the mirror and the front bumper, the full camera system will need to be re-calibrated. The estimated cost is astounding. Is this necessary? If so, what should it reasonably cost? Thanks for any advice

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