2018 Mercedes S560 & S500 Exterior, Interior, Test Drive – Video
The new biturbo is among the world’s most economical V8 petrol engines, and consumes up to six percent less fuel than its predecessor. To lower the fuel consumption, four cylinders of the new V8 are deactivated simultaneously under partial load with the help of the CAMTRONIC valve-lift adjustment system. This reduces the pumping losses while improving the overall efficiency of the remaining four cylinders by shifting the operating point towards higher loads. The turbochargers positioned in the V of the cylinder banks represent another special feature. The new V8 develops 345 kW (469 hp) and 700 Nm, and is installed in the Mercedes-Benz S 560 (combined fuel consumption: 8.5-7.9 l/100 km; combined CO2 emissions: 195-181 g/km) and Mercedes‑Maybach S 560 (combined fuel consumption: 9.3-8.8 l/100 km; combined CO2 emissions: 209-198 g/km). Both are also available with 4MATIC all-wheel drive.
The S 500 has an output of 320 kW (435 hp) and 520 Nm (combined fuel consumption: 6.6 l/100 km; combined CO2 emissions: 150 g/km). Over a short period, the Integrated Starter Generator makes a further 250 Nm of torque and 16 kW of output available. Compared to the similarly powerful S 500 predecessor with a V8 engine, it has been possible to reduce the CO2 emissions of the engine by around 22 percent.
New, intelligent forced induction that includes an electric booster compressor as well as an Integrated Starter Generator (ISG) provide outstanding power delivery without turbo lag. The ISG is responsible for hybrid functions such as boost or energy recuperation, while allowing fuel savings that were previously reserved for high-voltage hybrid technology. Below the line, the new in-line 6-cylinder engine delivers the performance of an eight-cylinder with significantly lower consumption.
Systematic electrification dispenses with the need for a belt drive for ancillary components at the front of the engine, which reduces its overall length. The slim design, together with the physical separation of intake/exhaust, creates space for near-engine exhaust aftertreatment. The 48-volt on-board power supply serves not only high power consumers such as the water pump and air-conditioning compressor, but also the Integrated Starter Generator (ISG), which also supplies energy to the battery by means of highly efficient energy recuperatio