The new mill is designed to meet future Real Driving Emissions regulations.

Mercedes-Benz has detailed a modernized diesel engine that will make its debut in the E-Class E220d.

Billed as the company's first all-aluminum four-cylinder diesel mill, the new 2.0-liter turbocharged powerplant is much lighter than its 2.15-liter predecessor -- shedding 76 pounds -- while fitting into a smaller footprint. The modular family is also claimed to offer lower noise levels and reduced vibration.

Notably, all of the necessary exhaust treatment components are configured directly on the engine itself. Thanks to the location of emissions control gear and advancements in catalyst coatings, Mercedes-Benz suggests the engine has no need to employ temperature management during cold start or at low load.

"In addition to the advantages in terms of emissions, this results in fuel savings, especially on short journeys," the company adds.

The new engine is designed to meet worldwide harmonized light vehicle test procedures (WLTP) and future Real Driving Emissions (RDE) test protocols, as well as all current measurement standards.

Engineers have implemented a multiway exhaust gas recirculation (EGR) system, combining cooled high-pressure and low-pressure EGR to better optimize treatment across a wider load and rpm range. Emissions also benefit from an improved AdBlue urea-injection mixer.

Altogether, the emissions and efficiency enhancements allow the new engine to deliver 13 percent lower fuel consumption while increasing output from 168 horsepower to 192 ponies.

The company plans to offer several output variants based on the same architecture, accommodating both longitudinal and transverse installations for front-, rear- or all-wheel drive vehicles.

The E220d is scheduled to arrive in showrooms sometime this spring, however Mercedes-Benz has not yet detailed market-specific launch plans or pricing.

Live images by Brian Williams.