2024 Mercedes-AMG SL-Class Review, Pricing, and Specs

SL43

$111,000 (est)

SL55

$143,000 (est)

$185,000 (est)

A host of luxury features come standard on all SL models, including massaging seats, a head-up display, and a Burmester stereo system. We’d go with the more expensive SL63 to unlock the twin-turbo V-8’s maximum power. Both the SL55 and SL63 are offered in either Touring or Performance specifications, with the latter coming with a front axle lift feature (to help it clear speed bumps) and darkened exterior trim.

Engine, Transmission, and Performance

Except for the entry-level SL43, which comes with a 375-hp turbocharged 2.0-liter inline-four, the SL models are powered by a twin-turbo 4.0-liter V-8 borrowed from the GT sports car. In the SL55 the engine makes a stout 469 horsepower but upgrading to the SL63 boosts that figure to a thundering 577 ponies. A nine-speed automatic is the only transmission, and an all-wheel-drive system and four-wheel steering are standard on the SL55 and SL63, while the SL43 is rear-wheel drive only. The top powertrains allow the revived SL-class to take on convertible versions of the BMW 8-series and Lexus LC—both of which are offered with powerful V-8 engines—as well as more sporting rivals, such as the Porsche 911. That said, we put the SL63 on the track during our Lightning Lap competition, where it proved shockingly capable. Back in the real world, drivers may find the SL has more selectable drive modes than is necessary, giving the impression that the car hasn’t quite found its focus. Acceleration is right-now responsive; in our testing, the SL63 roared to 60 mph in just 3.0 seconds accompanied by a baritone exhaust burble. We haven’t tested the SL55 or the entry-level SL43, but Mercedes says even the four-cylinder version is good for about 4.8 seconds to 60 mph with a top speed of 170 mph.

Fuel Economy and Real-World MPG

The SL55 earned an EPA rating of 14 mpg city and 22 mpg highway, while the more powerful SL63’s estimates are 1 mpg lower in both measures. The V-8–powered version of the BMW 8-series convertible bests the SL by a few mpg, as does the Lexus LC with its available V-8 engine. The SL43 estimates are considerably better at 21 mpg city and 27 mpg highway. We’re still waiting for our chance to put the new SL-class through our 75-mph highway fuel-economy test, which is part of our extensive testing regimen, to evaluate its real-world mpg. For more information about the SL’s fuel economy, visit the EPA’s website.

Interior, Comfort, and Cargo

The driver and passenger sit deep inside the SL with the base of the windows up around shoulder level. Most surfaces are wrapped in leather with contrast stitching, and the turbine-like air vents add a stylish note. The instrumentation is screen-based, and a large, portrait-style center touchscreen operates most functions. We don’t love the over-reliance on fussy touch controls, which are used even for audio volume and to lower or raise the top. The seats incorporate heating, cooling, and massage functions, as well as vents at the base of the headrest (Mercedes’s Airscarf) that can blow warm air on the occupants’ neck during cold weather. The tiny rear seats with upright backrests are too small for human cargo but make for a handy place to toss a briefcase or bag—especially since the trunk is quite small.

Infotainment and Connectivity

All SL models come with Mercedes’s latest MBUX infotainment system, complete with the system’s “Hey Mercedes” virtual assistant and a large 11.9-inch touchscreen infotainment display that can be adjusted for viewing angle depending on a driver’s preference. A 12.3-inch digital gauge display is also standard. Both Apple CarPlay and Android Auto are on hand as well, and the navigation system includes available augmented reality. All SLs come with a Burmester stereo system, but the SL63 can be optioned with an upgraded surround-sound version.

Safety and Driver-Assistance Features

A host of driver-assistance features are standard, including automated emergency braking and blind-spot monitoring. But Mercedes-AMG makes you pay extra for others, including adaptive cruise control and lane-keeping assist. For more information about the SL’s crash-test results, visit the National Highway Traffic Safety Administration (NHTSA) and Insurance Institute for Highway Safety (IIHS) websites. Key safety features are likely to include:

• Standard automated emergency braking with pedestrian detection
• Available lane-departure warning with lane-keeping assist
• Available adaptive cruise control with a lane-centering feature

Warranty and Maintenance Coverage

Mercedes-AMG’s standard warranty package is the least special thing about its cars and covers a basic four-year/50,000-mile period with no frills or extras. Both the 8-series and the LC offer significant complimentary scheduled maintenance programs, which may make those cars more attractive to those who seek to lease.

• Limited warranty covers four years or 50,000 miles
• Powertrain warranty covers four years or 50,000 miles
• No complimentary scheduled maintenance

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