2019 Mercedes AMG CLS53, CLS450, CLS350d – Video
The new Mercedes-AMG CLS 53 4MATIC+ (combined fuel consumption 8.7 l/100 km, combined CO2 emissions 200 g/km)[1] combines sporty design with powerful performance and high efficiency. Its centrepiece is a new, electrified 3.0-litre engine featuring twin-turbocharging and an electric auxiliary compressor. The 6-cylinder in-line engine generates 320 kW (435 hp) and delivers maximum torque of 520 Nm.
Its EQ Boost starter-generator delivers an additional 16 kW (22 hp) and 250 Nm over a short period, and feeds the 48 V on-board electrical system. Other technical highlights include the AMG SPEEDSHIFT TCT 9G transmission and the fully variable all-wheel drive system AMG Performance 4MATIC+.
The Mercedes-Benz CLS 450 4MATIC (combined fuel consumption: 7.8 l/100 km; combined CO2 emissions: 178 g/km), powered by a systematically electrified six-cylinder in-line petrol engine, will be available at market launch. Its performance data: 270 kW/367 hp and 500 Nm of torque, a further 250 Nm of torque and 16 kW/22 hp available via EQ Boost over short periods. Compared with the similarly powerful CLS 500 predecessor with a V8 engine, it has been possible to reduce the CO2 emissions of the engine by around 23 percent.
The integrated starter/alternator (ISG) is responsible for hybrid functions such as EQ Boost or energy recuperation, while allowing fuel savings that were previously reserved for high-voltage hybrid technology.
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 recuperation.
The new six-cylinder in-line diesel engine is available in two output classes: The Mercedes-Benz CLS 350 d 4MATIC has an output of 210 kW (286 hp) and 600 Nm (combined fuel consumption: 5.6 l/100 km; combined CO2 emissions: 148 g/km). The CLS 400 d 4MATIC with 250 kW (340 hp) and 700 Nm is the most powerful series production passenger car diesel engine ever offered by Mercedes-Benz (combined fuel consumption: 5.6 l/100 km; combined CO2 emissions: 148 g/km)[1].
Although the output has increased noticeably compared to the preceding model, the new engine consumes up to ten percent less fuel. The special traits of the top-of-the-line engine in the diesel family include the stepped-bowl combustion process, two-stage turbocharging and, for the first time, the use of CAMTRONIC variable valve-lift control. Its design features a combination of aluminium engine block and steel pistons as well as further improved NANOSLIDE® coating of the cylinder walls.
All components relevant to efficient emissions reduction have been installed directly on the engine. The integrated technology approach combining the new gradual recess combustion process, dynamic multi-way exhaust-gas recirculation and near-engine exhaust-gas aftertreatment, combined for the first time with variable valve-lift control, makes further reduced consumption with low emissions possible. Thanks to the near-engine insulated configuration, exhaust-gas aftertreatment does not suffer great levels of heat loss and generates extremely favourable operating conditions.
Like the new petrol engine, the new six-cylinder diesel engine meets emissions legislation according to RDE (Real Driving Emissions). The consumption figures were determined according to the new WLTP (Worldwide Harmonized Light Vehicles Test Procedure) measuring process. More about this in the next section.
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