I have a large plastic rectangular object that is hanging and it is about to fall off. It seems to be there to protect something vital. Its location is to the left of the right rear tire, it seems to be underneath the right rear passenger seatsection . I brought the car to the mechanic about 6 months ago for the same problem because the thing fell off. He seems to have repaired it with the metal from those disposable metal hangers. What is this part called and what can i buy to properly install this object so that it wont fall again. Id prefer the proper mercedes srew bolts or whatever holds this thing to the car. Any help would be greatly appreciated.

 

Cover for the jacking point nub,two on each side of the car,look at the one on the otherside and install same,at least that sounds like your discription.
ohlord

 

Fuel pump and fuel pressure regulator cover.
it is held in place by a few screws....and easy repair job.

 

oh,that right side!nevermind
ohlord