Drive system: The heart of an athlete

Sep 25, 2018
Stuttgart/Seattle

The engine portfolio of the A-Class Saloon is efficient and powerful, and completely fulfils the Euro 6d TEMP limits[1]. There are six engines available at launch, two of which are combined with 4MATIC all-wheel drive.

Innovations in the M 282 with a displacement of 1.33 litres and up to 120 kW include cylinder shutoff (in conjunction with the 7G-DCT transmission) and the delta shape of the cylinder head. The second new petrol engine is the M 260 with a displacement of 2.0 litres, 140 or 165 kW and 350 Nm. New features include CAMTRONIC for the intake camshaft. Both petrol engine series have low-friction cylinder walls and a particulate filter as standard. Also new is the four-cylinder diesel (OM 608) with a displacement of 1.5 litres, up to 85 kW and up to 260 Nm. Its highlights are a near-engine mounted emission control system with AdBlue® technology, a turbocharger with optimised response time and water intercooling. The fuel tank has a capacity of 43 litres as standard, with a 51-litre tank optionally available.

The engine line-up at launch:

  • A 200 (120 kW/163 hp, 250 Nm); with 6-speed manual transmission (fuel consumption combined 6.0-5.7 l/100 km, CO2 emissions combined 138-131 g/km)
  • A 200 (120 kW/163 hp, 250 Nm); with 7G-DCT dual-clutch transmission (fuel consumption combined 5.4-5.2 l/100 km, CO2 emissions combined 124-119 g/km)
  • A 220 4MATIC (140 kW/190 hp, 300 Nm); with 7G-DCT dual-clutch transmission (fuel consumption combined 6.7-6.5 l/100 km, CO2 emissions combined 153-149 g/km)
  • A 250 (165 kW/224 hp, 350 Nm); with 7G-DCT dual-clutch transmission (fuel consumption combined 6.3-6.1 l/100 km, CO2 emissions combined 143-139g/km)
  • A 250 4MATIC (165 kW/224 hp, 350 Nm); with 7G-DCT dual-clutch transmission (fuel consumption combined 6.7-6.5 l/100 km, CO2 emissions combined 153-149g/km)
  • A 180 d (85 kW/116 hp(, 260 Nm with 7G-DCT dual-clutch transmission (fuel consumption combined 4.3-4.1 l/100 km, CO2 emissions combined 113-107g/km)

4MATIC all-wheel drive: More driving pleasure, more efficiency

4MATIC components include the power take-off to the rear axle, which is integrated into the automated dual clutch transmission, and the rear axle differential with an integrated multiplate clutch. This is no longer electro-hydraulically powered, but instead electro-mechanically. The advantages of this control system are above all non-rpm-dependent operation across the entire actuation range, pilot control of the clutch while still stationary and higher efficiency thanks to the ball ramp concept.

Drive torque distribution between the front and rear axles is fully variable. Depending on the driving situation, 100% of the drive torque can be directed to the front axle (e.g. when driving straight ahead with no increased slip at the front axle), or in borderline cases up to 50% can be directed to the rear axle if the friction coefficient suddenly changes.

Using the DYNAMIC SELECT switch, the driver is able to influence the characteristics of 4MATIC even more than before. In the A-Class there are two characteristic curves available for clutch control.

[1] The stated figures were determined in accordance with the prescribed measuring method. These are the "NEDC CO2 figures" according to Art. 2 No. 1 Implementing Regulation (EU) 2017/1153. The fuel consumption figures were calculated based on these figures.

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