Last week, I spoke with MBUSA tech and local dealer parts dept. to inquire about the balancer part # on my 2000 E320. Both claimed that they could not (or would not) tell me the balancer part # built on my 10/99 production date vehicle.
Of course, both claim to be unaware of any balancer problems on M112 or M119 engines.
I checked the part # myself today using info. from this thread.
ShopForum is the best!