A Mercedes-Benz official has announced there won't be a three-cylinder engine powering one of the company's main RWD sedans.

A Mercedes-Benz official has announced there won't be a three-cylinder engine powering one of the company's main RWD sedans.

Although the downsizing era has already begun, Mercedes-Benz's head of engine development Bernhard Heil recently stated at the 2014 Geneva Motor Show a three-cylinder engine will not be installed in the firm's core range of rear-wheel drive cars. This decision was taken because "there are too many compromises, such as refinement and the savings aren't that significant."

Heil does acknowledge Mercedes-Benz has done some experimenting with such engines but loss of refinement and vibrations are just too high especially at lower speeds when fuel savings could be maximized. However, the front-wheel drive A- and B-Class models could gain a three-cylinder gasoline and/or diesel engine in the future, as well as a hybrid configuration by installing an electric motor/generator between the front wheels.

In addition, Mercedes-Benz is also working on a new diesel engine which will have a 1.9- or 2.0-liter capacity making it smaller than the reputable 2.1-liter that powers around 70 percent of all Mercedes-Benz models equipped with a RWD layout.

Mercedes-Benz says no to three-cylinder engines for RWD sedans