Here is the diagram to Mercedes-Benz W203 EZS in circuit using Xprog-m ecu programmer.
Use cable C45 + A6 adapter. Remove this module from the car carefully:
Remove back plastic cover from EZS and locate points on the board checking photos below and solder cable leads as it shows:
9S12 W203 EIS
912 W203 EIS
This wiring diagram can be used for: