Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
You said,"Usually all you have to do...." I have tried the process you outlined and actually left the key installed into the EIS ignition switch for about 2 hours with no results. I hope you also have a Plan-B for this problem.
We have a misunderstanding. I was describing what the key/alarm/remote does so you would know what the key is supposed to do. One key does all those things and one does not. I need to program the replacement key to work as the original one does.