The drop-top SL has several changes for 2017, including styling updates and more horsepower. The entry-level SL450's twin-turbo 3.0-liter V6 engine gets a boost to 362 hp and is mated to a new nine-speed automatic. The next step up the SL ladder, the SL550, is powered by twin-turbo 4.7-liter V8, now making 449 hp. The monster AMG models--SL63 and SL65--make due with a 577-hp twin-turbo 5.5-liter V8 and 621-hp twin-turbo 6.0-liter V12 engines, respectfully. The SL is a luxury roadster with a foldable hardtop that's comfortable and quiet. One neat feature is a roof panel that offers varying degrees of opacity. Safety features include autonomous braking, lane-keeping assist, blind-spot detection, and adaptive cruise control. This vehicle can be outfitted with a semi-autonomous driving package. Consumer Reports believes automakers should take stronger steps to ensure that vehicles with those systems are designed, deployed, and marketed safely. Please heed all warnings, and keep your hands on the wheel.

Alert
This vehicle can be outfitted with a semi-autonomous driving package. Consumer Reports believes automakers should take stronger steps to ensure that vehicles with those systems are designed, deployed, and marketed safely. Please heed all warnings, and keep your hands on the wheel.