ok...kind of an update...part # 05102933AA is supposedly an o-ring that fits to the rubber spacer gasket, but is not the spacer gasket...according to the dealer.
part# 5143102AA was supposed to be the spacer gasket (at least thats what another dealer told me) and the dealer that my car is at says its the air box gasket number. so i am back at square 1...

Mercedes is no help.... I am hoping that maybe someone else has a part number or pic that might actually help my dealer. thanks again