I tried to connect to the car W140 S320 '92 with a system of LH-SFI.
The screens below are screenshots of the program while working with the system LH-SFI.

These screenshots are obtained in the presence of ecu.dat file for this ECU (the cost is USD 45)

Mercedes, LH-SFI, Diagnose W140 M119 M104
Mercedes, LH-SFI, Diagnose W140 M119 M104
Mercedes, LH-SFI, Diagnose W140 M119 M104

HFMScan - program for diagnose M111/M104( HFM-SFI ).

my ELM327 - diagnose M111/M104(HFM-SFI) from SmartPhone/Tablet/Notebook