Mercedes-Benz Will Not Use Three-Cylinder Engines on MRA Platform

Mercedes-Benz C-Class W205 1 photo
Photo: Daimler AG
Despite previous rumors, which intensified after BMW introduced their first three-cylinder engine with the innovative i8, it seems that Mercedes-Benz will not put a three-pot in any of its large cars.
We are talking about three-pointed star models built on the new MRA (Modular Front Architecture) platform, such as the upcoming C-Class and E-Class model families.

The information comes straight from Bernhard Heil, head of engine development at Mercedes-Benz cars, who was quoted by Autocar at the Geneva Motor Show 2014. “We have looked at three-cylinder engines, but there are too many compromises, such as refinement and the savings aren’t that significant.”

As some of you technical geeks already know, an inline three-cylinder engine is inherently unbalanced and needs a balancer shaft to counteract some of its harshness, which is why until now they have been mostly used in smaller cars.

The vibration problem, somewhat loss of refinement and increased build costs associated with adding a balancer shaft are simply too much for such a technology to arrive in the new C-Class, for example, as it was initially rumored.

Despite the above, an inline three-cylinder engine might eventually make its way on the smaller MFA (Modular Front Architecture) platform, on models like the A-Class or B-Class.

This is not yet confirmed, but in the future you may very well see a three-pot under the hood of one of the aforementioned cars, some even with a small electric motor to compensate for some of the NVH (Noise, Vibration, Harshness) and lower torque figures.
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About the author: Alex Oagana
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Alex handled his first real steering wheel at the age of five (on a field) and started practicing "Scandinavian Flicks" at 14 (on non-public gravel roads). Following his time at the University of Journalism, he landed his first real job at the local franchise of Top Gear magazine a few years before Mircea (Panait). Not long after, Alex entered the New Media realm with the project.
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