Performance Specifications of the 2025 Mercedes-AMG® SL 43 Roadster

How Does the 2025 Mercedes-AMG® SL 43 Roadster Perform?

At its core sits a handcrafted 2-liter Inline-4-cylinder turbo engine, the first of its kind in the "One man, one engine" tradition of AMG®. Pushing out a hearty 416 horsepower and 369 lb.-ft. of torque, this compact powerhouse catapults the SL 43 from 0 to 60 mph in just 4.6 seconds. A big contributor? The electric exhaust-gas turbocharger, lifted straight from F1® tech. By spooling up instantly—even at low RPMs—it keeps boost pressure steady, letting you surge ahead without waiting for the turbo to catch up. Add the belt-driven hybrid Starter-Generator, and you get that extra jolt of electric torque just when you need to zip past a slow-moving semi or tackle a sharp incline. 

Shifting feels sharper and faster thanks to the AMG® SPEEDSHIFT® MCT 9-speed transmission. Instead of a traditional torque converter, it uses a wet startup clutch and magnesium casing to reduce weight and enhance reaction time. Whether cruising through the city in Comfort mode or hitting the curves in Sport+, each gear confidently clicks into place. Use AMG® DYNAMIC SELECT to tailor your drive with preset modes—or go full “mad scientist” with Individual mode and create your own combo of throttle response, exhaust tone, and suspension behavior. Pair that with the AMG® DRIVE UNIT on the steering wheel, and you have fingertip control over every setting. 

But it’s not just about speed—it’s about staying in control. The 4-wheel multilink suspension uses lightweight aluminum to keep things tight in corners while adapting to bumpy roads. Add in ESP Dynamic Cornering Assist and the AMG® High-performance Composite Braking System, and you’ve got sharp steering, aggressive grip, and confident stopping power—even when you’re diving hard into that hairpin near the edge of town. 

If you’re impressed with the 2025 Mercedes-AMG® SL 43 Roadster, we invite you to Mercedes-Benz of Arrowhead in Peoria, AZ, to take it for a spin. 

Interested in the 2025 Mercedes-AMG® SL 43 Roadster?