I have had the opportunity to race 2 SLK's on numerous occasions. Both owners are members here (Steve being one of them), and both have similar mods to mine. The 2 SLK's have separated cooling setups which I do not have. Bottom line is..... the winner has always been determined by who got the best reaction time. Sorry Steve. The point is, both the SLK and the SRT are practically identical in the 1/4 mile.