hi my name is bruce ,i am retired NAVY 20 years engineer, and proud owner of two mercedes . 2003 s-430 and 2000 silk 230. i have a issue with the slk230 of not starting. i need someone experianced with these cars computers to clarify the DAS system and how it works. this car has an immobolizer relay module behind the dash cluster which goes to the ecu. from my understanding the ignition switch has a coil on it that reads the key blade and sends that through to the immobilizer relay ,then to the ecu. i had the ecu rebuilt ,but the immobilizer relay module is from another car same year. i am being told that the relay has to be programmed for my ecu. that does not make sense to me , i know the ecu has the eeprom immobolizer chip in it. i know the car spins over for a few seconds but the injectors are not letting fuel through. sorry for the long post but please help me get this baby starting again. i really dont want to take it to the stealership.