For 2017, the updated SLK also gets a new name: SLC. It features a retractable hardtop that does a great job at keeping the interior quiet. The SLK250 we tested had a 1.8-liter turbo four-cylinder that delivered ample thrust, and the new SLC300 uses a more powerful 2.0-liter engine coupled to a nine-speed automatic. There is a more powerful V6 SLC43 version.
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