I will definitely keep your ideas in my back pocket. am going to keep trying with the with the Bosch for now. the main thing is to turn off the IMMO which supposedely can be done. Or clone some of the critical information from the V6 ECU to the V8 Ecu. If I can't get around the IMMO, I will go Motec since I have used a Motec M48 on another car in the past. As far as I know you can't tune a Motec without a dyno, so my car would be tuned by Norwood here in Dallas.

Brabus used the Bosch ECU with their V8 conversion for both the SLK and Crossfire. Maybe they have a relationship with Bosch to get a custom ECU made?