The SLK consists of a 2.0lt 136 hp normally aspirated engine, a 2.0lt, 163hp compressed engine, a 2.3lt 193hp compressed engine and, for the first time, a 3.2 V6 producing 225hp that provides some really serious performance as 0-60 mph takes less than 6.5 seconds. The very interesting part about the SLK is the roof of this car. SLK goes coupe-to-convertible in just 25 seconds, storing the folded roof over the shelf, leaving space for soft bags under. You can do all of this with just a touch of a button.