Mercedes has perfected gasoline engines and it looks like they will be available for many years to come. The new Mercedes M254 and M256 engines support this statement.
Mercedes is not one of the pessimistic manufacturers that sees the end of internal combustion engines quite close.
Jaguar announces it will become a 100% electric brand in 2025, Land Rover and Volvo plan the same for 2030, while VW says that in 2030 it will sell 70% of its production with electric propulsion.Mercedes believes it will sell thermal engines by 2039, and has refined diesel and gasoline engines. The engines from the new 4- and 6-cylinder in-line family prove that the gasoline engine still has a future.
Mercedes M254 engine
Integrated starter generator (ISG) (3) that works on the 48V network delivers up to 20 HP and 200 Nm and supports the heat engine at start. When you accelerate, the starter generator’s first send its torque to the gearbox.
The supercharger separates the air flow for cylinders 1 and 4 and 2 and 3, respectively. In this way there was no need to adopt a turbine with variable geometry. To avoid turbo lag, until the turbine comes into operation, a small Borg Warner electric compressor (2) with a power of 5 kW, water cooled, which reacts extremely quickly in only 300 ms and spins at 70,000 rpm, provides the necessary overpressure. The electric compressor is located on the cold side of the turbocharger and compress the air intake until the exhaust gas flow is sufficient to drive the turbocharger (1).
And above there is an overboost function which can allow and additional 27 HP on the new C-Class W206 (41 HP on the E 350 W213) for a short period of 30 seconds. This period is limited by the exhaust gas temperature. The result is a linear power delivery almost the same as a naturally aspirated engine and secondly the engine is very economical.
This engine develops 272 HP and 400 Nm in the E 350 (W213) and 258 HP and 400 Nm in the new Mercedes C-Class (W206).
Mercedes M 256 engine
The in-line 6-cylinder M256 engine is part of the same family and operates according to the same principle: a slightly more powerful integrated generator starter, with 22 HP and 250 Nm, powered by a 48V network support the thermal engine at acceleration and the same Borg Warner electric compressor deliovers the overpressure until the exhaust gas flow is sufficient to drive the turbocharger.
This engine is available in two power levels: 367 HP and 500 Nm in the Mercedes S 450 4Matic (W223), E 450 4Matic (W213), GLE 450 4Matic (V167), GLS 450 4Matic (X167), CLS 450 4Matic (C257 ) and GT 43 4Matic (x290) and 435 HP and 520 Nm in S 500 4Matic (W223), AMG GLE 53 4Matic (V167), AMG CLS 53 4Matic (C257) and AMG GT 53 4Matic (W213).