Mercedes-Benz E-Class updates debut ‘EQ Boost’ 48V technology

Mercedes-Benz has expanded its petrol and diesel engine options for the E-Class and CLS models in the UK, with the addition of an ‘EQ Boot’ electric system for added power while maintaining economy figures.

First up, the E 400 4MATIC is out and a new E 450 4MATIC with EQ Boost is in. As seen in the 400 models, the E 450 is powered by a 3.0-litre inline six-cylinder petrol, codenamed M256, with the new electric boost system dubbed ‘EQ Boost’.

Output is rated at 273kW, with 500Nm of torque, with an additional 16kW/250Nm available thanks to a 48-volt inline starter-generator mated to the powertrain. Mercedes claims a 0-100km/h time for the E 450 4MATIC of 5.6 seconds, while consumption figures are rated at 6.7L/100km for the coupe, and 7.4L/100km for the cabriolet.

Up next is the all-new E 400 d 4MATIC which is replacing the E 350 d. The 3.0-litre turbo-diesel inline six engine, codenamed OM656, now produces 253kW and an impressive 700Nm of torque. The coupe can hit the 100km/h mark from a standstill in 5.1 seconds, with the cabriolet a tenth of a second slower; both are limited to 250km/h.

Mercedes has also given the CLS 350 coupe an all-new four-cylinder petrol option with its EQ Boost technology, good for 220kW of power and 400Nm of torque. The EQ Boost in the CLS 350 adds just over 10kW of power and 150Nm of torque, which gives it a 0-100km/h time of 6.0 seconds.

The E 350 d 4MATIC all-terrain has been replaced by the E 400 d 4MATIC all-terrain, which features the OM656 3.0-litre inline six-cylinder engine producing 253kW/700Nm, and can cover 0-100km/h in a claimed 5.4 seconds.

Although these updates have been announced in the UK, similar changes are expected for other markets including Australia over the coming months.

Alexi is a contributing news journalist and junior road tester at PerformanceDrive. He has a passion and appreciation for the engineering in cars, as well as new technologies that lessen the impact on the environment. His dream cars are an M3 to drive to work, and a LaFerrari for the weekend.