thank you for sharing the info about the power output. I don't recall the comparison between the two but I will also see if the differences can be found in compression ratios, valve size differences, manifold design and cam differences in addition to the tuning. I don't doubt that there are mapping differences in the ecu but there could be much more that leads to the varying power output.

You do pose a legitimate curiosity that someone here may know is the Crossfire trans weak? I know it will need an aftermatket clutch real fast but the trans itself how much torque and who is of proven for? I honestly think I am along way from needing to do dyno mapping or dyno tuning for power (if that's even a possibility with the benz ecu. I know they can be unlocked but I have not yet read where people have successfully done anything specific with the fuel or ignition maps other than copy one models mapping over another's by re-chipping it have the they? If I have not got that far yet I am very interested in reading about this as well and please direct me to that thread.

Please don't take my response the wrong way, I am very new to this and know very little about the SLk or the Crossfire but I have built a high hp car that the aftermatket missed so I do have a little experience from a generalized perspective.