Used 2019 Mercedes-Benz SL-Class SL 450 Convertible Review

When it comes to dignified top-down motoring, the Mercedes-Benz SL is an icon. It blends a prodigious technology portfolio with sumptuous luxury like few convertibles can. It's aging but gracefully so, and the 2019 model will likely be the last year of this generation. The current car, however, is still at the top of its game.

Despite its seemingly conventional nature, the SL is replete with impressive features. Take its roof, for example. Wind noise and buffeting are minimal with the power-folding roof stowed, and when raised the roof seals out noise like a traditional coupe does. But it's also available with an electronically dimmable overhead glass panel for when you want to split the difference between top-down and top-up driving. Its optional active-bolster seats are gimmicky, but the Airscarf system that emits warm air from beneath the headrests is sublime.

Three engine choices give buyers wide latitude in how quickly they want the scenery to blur, and its sophisticated suspension smooths out rough pavement with surprising grace. It's quite capable on a spirited drive, even if its weight and general demeanor suggest otherwise.

Despite its speed, the SL has never been the sportiest drop-top out there, and the 2019 model is no different. It is, however, supremely comfortable and capable.

The 2019 Mercedes-Benz SL is a two-seat convertible with a power-folding hardtop and is available in three trim levels. The base SL 450 is powered by a turbocharged 3.0-liter V6 (362 horsepower, 369 pound-feet) and sends power to the rear wheels through a nine-speed automatic transmission. The SL 550 ups the power with a turbocharged 4.7-liter V8 (449 hp, 516 lb-ft). Finally, the AMG SL 63 comes with a bigger turbocharged 5.5-liter V8 (577 hp, 664 lb-ft), a seven-speed dual-clutch automatic and special performance hardware and styling elements.

Standard features for the SL 450 include 19-inch wheels, a power windblocker, LED headlights and running lights, automatic high beams, automatic wipers, a panoramic sunroof, front and rear parking sensors, forward collision warning and mitigation, keyless entry and ignition, selectable drive modes, and an adaptive suspension.

Inside, you get dual-zone automatic climate control, a power-adjustable steering wheel, sun-reflecting leather upholstery, power-adjustable heated seats, a navigation system, voice controls, the COMAND infotainment system, Apple CarPlay and Android Auto, two USB ports, and an 11-speaker Harman Kardon sound system with a six-CD changer and satellite and HD radio.

The SL 550 adds AMG-branded 19-inch wheels, a power trunklid with hands-free activation, an automated parking system, the Airscarf neck-level heater, and ventilated seats with active side bolsters and massage functions.

The AMG SL 63 receives high-performance drive and suspension settings, Active Body Control (which mitigates body roll while cornering), upgraded brakes, a limited-slip differential, unique AMG gauges and other AMG-themed aesthetic flourishes, a dashtop analog clock made by International Watch Co., upgraded leather upholstery and a simulated-suede headliner.

Most of the fancier trims' premium features are optional on lesser models. All SLs are eligible for a mobile Wi-Fi hotspot and many interior upholstery and trim upgrades. AMG models can be outfitted with carbon-ceramic brakes and carbon-fiber exterior trim.

Each vehicle typically comes in multiple versions that are fundamentally similar. The ratings in this review are based on our full test of the Mercedes-Benz SL 63 AMG (turbo 5.5-liter V8 | 7-speed automatic | RWD).

NOTE: Since this test was conducted in 2015, the current SL has received some minor revisions. Our findings remain broadly applicable to this year's model, however.