Notes on assigning the cylinder head gaskets - AH01.30-P-1000-06PI
ENGINE 642 in MODEL 461, 463
Assignment of valid cylinder head gaskets to the corresponding engine is, also in the case of mounted cylinder heads, recognizable on the right cylinder head gasket (2). The cylinder head gasket (2) with open hole (1) is to be used for vehicles with a vacuum pump. The cylinder head gasket (2) with a closed hole (1) is to be used for vehicles without a vacuum pump.
Courtesy of MERCEDES-BENZ USA