I dunno what to say, I would thihnk that must have been a very hard bump you made to bend that perch, but you never know, maybe the perch weakened over the years, or maybe it was defective, or repaired before from an accident.
If you check the good MB shops section of the forums, you might be able to find a good shop near you that can do the repair.
Get your alignment checked while you are at it and have the car looked over for any damage you can't see by looking at it.
'92 300CE - Sold
2004 C240 - C7 Wheels
2015 ML350 - P1, Pano, Ash poplar wood, Sport Dinamica interior, Running Boards Keyless go.