I can help with the infomation I have from my own research and the info Bosch was able to give me regarding the PCM / ECU... When you remove the PCM you'll notice that it is an integrated circuit board and has a 1"x 1" chip along with all kinds of fun other electronic things... The chip is an EPROM that contains the valuable information that talks to all of the other (24) If memory serves me, sensors that integrate into the operation of the engine and drivetrain... The EPROM chip is the same that you would find in any (V6-V12) Mercedes within the 97 to 2006 range... Obviously the programming is different... The big problem you will find is that the inputs into the PCM are specifically designed for a V6 engine... So, you are going to have to figure out how to input / output the two additional singnals for / from the injectors and coil packs... There is not a port into our system that will allow this to happen... I thing you are going to need the entire PCM, not just the ECU "eprom" chip... Like I said on the phone when we spoke, your BIG headache is going to be the electronics since you are trying to keep this car operational with all the accessories... If you were just building it as a track car it would be really easy with a MOTEC M800... I would try to find info about keeping your OEM PCM in place and having a piggyback ECU system to run the engine only...

Best of luck... I don't envy the amount of work / research you have ahead of you...