Hi Larry. Congrats on the new purchase. Didn't know you had crashed the previous SLK.

Two thoughts. On my old SHO the variable intake runners could be disconnected. You could tell the difference, but it was subtle, not dramatic. Mostly the lack of a switchover to the short runners at the designated rpm. I don't think a malfunction there is going to cost the kind of power you are missing.

Second. Not sure a 320 is much faster than a 230. It's approximately 215hp vs 190, and it weighs a bit more. More refined for certain, which of course makes it feel slower. So you may have to adjust expectations accordingly. That said, it definitely sounds like there is something to be chased down in the new car. Good luck.