Originally Posted by slk320 guy
I believe on my SLK320, I have a switch which turns off the TC, and does not limit RPMs. Not sure how it is wired in...have no engine manual. Will check with my SLK buddies to see if they have any info.
Yep, the xfire switch doesn't limit RPM either, it was only doing this whilst messing with the speed sensors and TC/ESP fuses at the same time.