On the benz you are parting, do you have the ignition switch?
I am looking for part number 2155450608 that is stamped on the EIS (ignition) switch.
Its not much value since it married to your car but I am doing research on this design and hope to find a way to reprogram them one day. What's motivating me is that my own ignition switch will not learn new keys and I'm stuck at the moment.
Please let me know what your part number is for the switch and I can check if it can help.
Jim in Houston, TX 77024