sadly as far as i can work out, (which is limited
)
the nachrutzsatz (retrofit set) has a part number
the part number has an EBA (fitting instruction)
but.
the SA code functions completely independant of this procedure.
Normally, with any chassis nr, i can find every retrofit set that BMW has for that model
and for every set, i can get you the EBA fit manual
But, i havnt found an option on the ETK where i can pick an SA, and then get the retrofit number for it
i think this is because some of the SA codes are created to cover all manner of things, not just equipment
