Look at this EIS, it is from a 2002 w209. I’m trying to connect via OBD using VVDI Pro (Xhorse VVDI PROG Programmer )at first with no lucky.
It was w211 st12
Diagram had a couple of components that where different, but it still worked.
W211 St12 adapter was completely different as well.
Plastic cover was 209.
Update:
Didn’t read through IR.
Successfully read on prog w211 st12.