Used 2018 Mercedes-Benz SL-Class Convertible Trims Comparison

Standard features for the SL 450 include 19-inch wheels, a power windblocker, LED headlights and running lights, automatic high beams, headlight washers, 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, Mercedes' Mbrace emergency communications, 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 a 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.

At the top of the SL food chain is the AMG SL 65, which gets staggered-diameter wheels (19-inch front, 20-inch rear), adaptive LED headlights, the Magic Sky Control electrochromic dimming roof, soft-closing doors, adaptive cruise control, rear collision mitigation, blind-spot monitoring, lane keeping assist, and a 12-speaker Bang & Olufsen sound system.

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.