60-130 MPH - Times or even better 60-170 MPH - Times . Like I showed in my Video...

YouTube - SLK32 AMG 100-270 KM/H in 23 Seconds.

In my Opinion a car which can't maintain the Power at higher speeds is not properly tuned. But maybe this is only important, if you have the possibility to drive at very high speeds...

@240 : Monitor your IAT's and Timing and you will see the whole story.