I got a problem reading Mercedes W230 2003 EIS password with xhorse vvdi mb tool. I have the original key in hand and need to add a spare key. Try both IR and OBD failed.
Need to remove EIS and read with vvdi mb or vvdi prog.
Remove EIS and read with vvdi mb and EIS/EZS test adapter following the wiring diagram below
FYI: Check more Benz EZS/EIS bench pinouts here
Or read EIS data with VVDI Prog
VVDI Prog wiring diagram to Benz W230 EIZ
or using Benz EIS/EZS adapter to read without soldering