BMW E39 Siemens MSS 211321001201 File Info
You can view the file details below.
Hersteller
BMW
Serie
E39
Baureihe
M5
Output
400.0PS 294.2KW
StgHersteller
Siemens
StgBaureihe
MSS
Stgnr_Stg
Stgnr_Her
Software
211321001201
SoftwareVersion
You can find the chip tuning file you are looking for on "Carecufile.com"