The plot thickens, the Bosch 047 injectors in the 103 motor are the same as those used in the 3.5,4.5,3.8,and5.0 liter motors. The 054 injectors are used in 4.2 and 5.6l motors. The early six used a different seal. The v8s have a plastic insulator mixing body that the injector and seal fit into. It is sealed to the head with a green o-ring the size of your thumb.
Bosch Master, ASE Master, L1
33 years MB technician