Originally Posted by Sidez
You need to tune the ecu, either yourself or through a professional like one of our forum favorites "SI" Speed Innovation or a well known mercedes tuner like Renntech... after the tune the speed should be limited by the transmission... to about 175-190 i guess...?!?
I checked to make sure Renntech took out my limiter, I ran it up to a little over 170 and it was still pulling hard. I had my eye's locked on the road, but I kept giving a quick glance at the speedometer & tach. I think I was taching around 5,500, I'd say she would do 190 to 200 since they raised my redline to 6,300 or 6,400.