What would you have done?

Did anyone get to see the video on www.break.com of the Mercedes dealer and the moonroof repair-that was brutal. Not the best kind of press that you want.
I am sure we have all been in a similiar type of situation before where the customer feels we missed diagnosed the vehicle.
I wonder how everyone else would have handled this situation?
I, personally, would have apologized and told the customer that a full investigation would occur and that I would follow up with him and let him know of the outcome.I think I would have conveyed to the customer that I was just as upset as he was.
I just like to hear how some of you folks would have responded.
I am sure we have all been in a similiar type of situation before where the customer feels we missed diagnosed the vehicle.
I wonder how everyone else would have handled this situation?
I, personally, would have apologized and told the customer that a full investigation would occur and that I would follow up with him and let him know of the outcome.I think I would have conveyed to the customer that I was just as upset as he was.
I just like to hear how some of you folks would have responded.