Mercedes-AMG SL 43: the entry-level is powered by a four-cylinder

A stone’s throw from the launch of the powerful V8 variants, the range of the Mercedes-AMG SL expands with the arrival of an unprecedented entry level variant called SL 43. Powered by a two-liter four-cylinder, it brings to the road an unprecedented electrically operated turbocharger directly derived from the system used on the Star’s Formula 1 single-seaters.

Basically, the two-liter is the same M139 that debuted in 2019 and that today equips the 45 AMG variants of the A-Class, CLA and GLA. Here, however, the engine is combined with a 48 Volt hybrid module, which drives an electric compressor and which also powers a motor generator (RSG). Thanks to this technology, the new four-cylinder is capable of giving the SL 43 a maximum power of 381 HP at 6,750 rpmfor a torque of 480 Nm from 3,250 to 5,000 rpm, to which must be added the 14 HP delivered by the RSG system, available as a surplus of power when maximum performance is required.

The unit is then combined as standard with the nine-speed AMG MCT automatic transmission, which sends all the power developed by the engine to the rear wheels only. Performance as a purebred sportswoman: 4.9 seconds are enough to shoot from 0 to 100 km / h, while the top speed is 275 km / h. All this with an average fuel consumption of between 8.9 and 9.4 l / 100 km.

Mercedes technicians also intervened on the fine-tuning of the chassis, offering AMG Ride Control suspension and AMG Dynamic Select with five driving modes (Slippery, Comfort, Sport, Sport + and Individual) as standard. For the sportier customers, then, there are the four-wheel steering and the optional AMG Dynamic Plus package, which adds 10 mm lower suspension, stiffer engine mounts, electronically controlled limited-slip rear differential and Race driving mode.

The new Mercedes-AMG SL43 differs from the 55 and 63 variants also in some small aesthetic details. The design of the front air intakes changes slightly, while the alloy wheels have a diameter of 19 inches, but the 20 and 21 inch ones remain optional. In the rear, however, the bumper has a cleaner line by “losing” the side air vents, while in the lower part the trapezoidal exhausts give way to four circular outlets.


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