If they did it in improper order, and I need a whole nother EIS, they will just tell me I need another ECM or something major. I got a new key, and they said the EIS is recognizing the key, but it won't start.īasically, I need to know the exact order of how you are supposed to program a new EIS and key (preferably to be able to use your old key as well if it is still good). They told me the EIS wasn't recognizing the key. I changed auto shops and replaced the EIS. I took it in because the AC was blowing hot air.Īt the auto shop the key stopped turning. It's over 2 months, my car has moved auto shops, but unfortunately I didn't take it to the Mercedes dealership.