MMB2860AA - Rear wishbone fulcrum bolt - item 1 in the diagram
This part is OK for rear right hand and rear left hand fitting.
This part is OK for the following;
X300 - VIN range 720125 to end of range
X308 - VIN range 812317 to end of range
XK8/XKR (X100) - from 042775 to end of range