The SLK features a retractable hard top that does a great job at keeping the interior quiet. The base SLK250 we tested had a 1.8-liter, turbo four-cylinder that delivered ample thrust and retuned 26 mpg overall. For 2016 it is replaced by a more powerful SLK300 that uses the same 2.0-liter engine as in the C300 sedan, but with a nine-speed automatic. The more powerful V6 and V8 engines use a seven-speed automatic. Handling is crisp and enjoyable, with rock-solid body control and communicative steering. It can be both challenging and rewarding when driven on a track. The ride is firm but refined enough even for lengthy trips. The tight cabin is well-finished, with excellent seats that feature warm air-vents in the headrests to keep your neck warm during chilly top-down drives.