Mercedes-Benz has just unveiled a third version of the just-revealed seventh-generation of its flagship SL-Class roadster, arriving to take the entry-level spot in the German manufacturer’s legendary lineup of two-seater convertibles. The new Mercedes-AMG SL 43 It arrives with half the cylinders of the other two announced versions, replacing the 4.0-liter twin-turbocharged V8 with a new version of Mercedes-AMG’s M139 turbocharged four-cylinder engine, which is capable of producing a maximum of 419 horsepower, for what is considered the most powerful four-cylinder series production in the world.
This exclusive variant of the M139 for the Mercedes-AMG SL 43 produces 381 horsepower and 354 pound-feet of torque, which it achieves constantly from 3,250 rpm and up to 5,000 revolutions, giving the vehicle great breakout force and poise. This is made possible by an electrically-driven exhaust gas turbocharger derived from Mercedes technology for its Formula 1 engines. According to Mercedes, the M139 offers “particularly spontaneous throttle response throughout the rev range.”
The powertrain also features a starter generator that adds 14 horsepower for short periods, making the SL 43 a semi-hybrid car. The SL 43 marks the first time that the M139 is positioned longitudinally and mated to Mercedes AMG’s nine-speed Multi-Clutch Transmission (MCT), sending all power to the rear wheels.
Mercedes promises an acceleration time from 0 to 62 mph (0 to 100 km/h) of just 4.9 seconds, and a top speed of 171 mph (275 km/h), 1.1 seconds and 14 mph less than the SL 55, the version that follows him in the ladder of the line. And it is that despite nominally having half the engine, the lower amount of weight in the nose of the vehicle works not only in favor of the driving dynamics of the SL 43, but also allows a better use of the available power.
1 from 38
The SL 43 looks identical to its bigger brothers, and boasts the same luxury and tech features found on them, but notably its own four-cylinder-specific lower front vents. At the rear there are also changes like oval exhaust tips instead of the square ones on the SL 55 and SL 63, and the absence of vertical vents at the bottom of the rear bumpers. Standard wheels are 19-inches, but Mercedes offers optional 20-inch and 21-inch wheels.
Mercedes-AMG did not reveal what the price of the SL 43 will be or when it will arrive in the United States. But we know that it should happen before the end of the year and of course, although it will cost less than the SL 55 and SL 63, it will not be cheap.