I'm real interested in what you receive under that number 3 437 224 035. Bosch describes that part as a terminal pin housing.
The trim screw is item #3. Since just about every one of these I have went into was worn out I have never tried the trim screw since school (about 17 years ago). I have tried using the bulk adjustment and don't think that adjusting a new part would be much problem.
Bosch Master, ASE Master, L1
33 years MB technician