It was probably a very good think the ECU did not get shipped back to me yesterday. We discovered something very interesting. We have been going through the ECU wiring diagrams and discovered that in 2002 on the CL500 MB changed how the start signal got to the ECU which is through the CAN and not through the standard 50 circut the Crossfire uses. This is also when MB started using the infrared key instead of the older type we have. Instead of shipping my replacement ECU out today, Beckmann is going to send out today an unlocked ECU from an older ML430/500. The ML used the older style key which I can verify since I traded a 2002 ML320 for my Crossfire. The Startech V8 Crossfire used ECU A 113 153 04 79 which was used in the ML500 and the pre 2002 CL500 so we may be on to something. The next step is to look at the ECU pinout of the ML.