Mercedes-AMG discontinues 4-cylinder SL43...Six-cylinder SL53 New Injection

*This content was translated by AI.

Mercedes-AMG has introduced its 2027 model, signaling a major change in the roadster entry-level lineup. The existing SL 43 model will be discontinued and replaced by SL 53 with a 3.0L series six-cylinder mild hybrid engine.

Emissions regulations are behind this decision. The M139 2.0L turbo four-cylinder engine applied to SL 43 did not meet Euro 7 standards, so it was decided to discontinue it due to increased technical and economic burdens. The CEO of AMG has also officially announced that the four-cylinder engine lineup will be discontinued.

The new SL 53 uses an M256 Evo 3.0L six-cylinder engine that has already been verified in E-class, S-class, and GLE. The engine is a mild hybrid with a 48 volt electrical system and an integrated starter-generator (ISG), which provides about 23 additional horsepower with ISG alone. The overall system output was 449 horsepower, 33 horsepower higher than the 416 horsepower of SL 43.

There is also a change in the way it is driven. Unlike SL 43, which was rear-wheel drive, SL 53 is basically applied with four-wheel drive. This improves acceleration performance and cornering stability, and reduces the performance difference with the V8 model.

The V8 engine lineup will also be reorganized. The 4.0-liter twin-turbo V8 on SL 55 and SL 63 will be changed from the existing cross-plane crankshaft to the flat-plane method. Flatplane cranks provide benefits in high rotational responsiveness and exhaust sound, with SL 55 increasing power to 537 horsepower and SL 63 increasing to 650 horsepower. The plug-in hybrid V8 (805 horsepower) with SL 63 SE performance has yet to be confirmed for changes in this revamp.

Meanwhile, the fans' response to the four-cylinder SL model was generally lukewarm. This is because the image that the small car engine is applied to the AMG brand's high-end roadster has not been easily erased. However, the M139 engine had technically excellent completeness, including over 200 horsepower per liter and closed deck cylinder blocks. Nevertheless, the completeness of the lineup is expected to be further increased as external regulations restrict the choice of AMG.

The new SL lineup will be officially unveiled before the end of this year.

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*This content was translated by AI.