Originally Posted by SRT6_Roadster
No they do not. There is no 'dyno mode' and there is no multimode dash display to set in the SLK32. At least not the R170 (which is the model the Crossfire is based on).
Well I have read this on the several German MB forums and there is instructions on how to do it, I believe the display is the in the dash cluster like our milometer. Admitted, some references are to the 350 not the R170 but others refer to other 320 powered Mercs:
"Well, Benz lovers, we found a way.
Here's how. To start, turn the ignition key to the first accessory position, making sure the dash display shows the odometer. The SRS airbag light should be on. Press the trip odometer reset button three times rapidly before it goes off. If you do this right, a screen will appear showing a voltmeter. Then press the "up" arrow on the left side of the wheel twice to take you to the "ESP dynamometer test" screen. Using the plus (+) button on the right side of the wheel, select "on." And then start the car. Warnings will appear informing you that the ESP, ABS, and BAS (brake assist) aids are now turned off and you're on your own."
Even the Crossfire will display other information here. By holding the trip reset in combination with the ignition key.