The Mercedes-Benz E-Class has long been synonymous with luxury and performance, and the 2014 E250 BlueTEC sedan elevates this reputation by introducing class-leading fuel efficiency to the midsize luxury segment. This model achieves an impressive EPA-estimated 45 miles per gallon on the highway and 28 mpg in the city, setting a new benchmark for diesel sedans and challenging competitors in its size category. Even when equipped with the advanced 4MATIC all-wheel-drive system, the Mercedes-Benz E250 maintains remarkable figures of 42 mpg highway and 27 mpg city. For drivers seeking a blend of opulence, driving dynamics, and exceptional fuel economy, the E250 BlueTEC stands out as a compelling choice.
The Heart of Efficiency: High-Tech Four-Cylinder Engine
The cornerstone of the Mercedes-Benz E250 BlueTEC’s efficiency is its state-of-the-art turbodiesel engine. This all-aluminum, in-line four-cylinder powerplant is engineered for both performance and economy. Featuring four valves per cylinder and dual overhead camshafts with vane-type variable valve timing, it delivers 195 horsepower and a substantial 369 lb-ft of torque.
To counteract the inherent vibrations of an in-line four-cylinder engine, Mercedes-Benz engineers incorporated two Lanchester balance shafts. These shafts, spinning at twice the crankshaft speed on low-friction roller bearings, ensure a smooth and refined driving experience. The two-stage turbocharging system further enhances the driving dynamics, eliminating turbo lag and providing rapid throttle response. This results in a broad torque curve across the entire engine speed range, translating to noticeably improved performance. Crucially, the impressive 369 lb-ft of torque becomes readily available from as low as 1,800 rpm, providing robust power for both city and highway driving.
BlueTEC: Advanced Diesel Refinement
The Mercedes-Benz E250 BlueTEC benefits from sophisticated BlueTEC technology, which further optimizes both power delivery and emissions reduction. The direct fuel injection system operates at an incredibly high pressure of 2,000 bar (28,400 psi). This elevated pressure enables more efficient combustion, leading to increased power output and reduced exhaust emissions.
The precision of the fuel injection is further enhanced by four piezo injectors. These injectors can be finely adjusted in response to changes in engine load and speed, ensuring optimal fuel delivery under all driving conditions. This advanced system positions the four-cylinder diesel engine in the Mercedes-Benz E250 at the forefront of passenger vehicle diesel technology.
AdBlue Injection: Ensuring Clean Emissions
To meet stringent emissions standards across all 50 U.S. states, the Mercedes-Benz E250 BlueTEC incorporates AdBlue injection as part of its BlueTEC system. This technology ensures the diesel engine’s emissions are as clean as a modern gasoline engine.
AdBlue, a water-based urea solution, is stored in a dedicated tank and accessed conveniently through the fuel filler door. It is metered into the exhaust system in minute quantities and requires refills only during routine scheduled maintenance. When AdBlue is injected into the pre-cleaned exhaust gas, it releases ammonia (NH3). This ammonia then converts nitrogen oxides (NOx) into harmless nitrogen and water within a downstream catalytic converter. This process, known as Selective Catalytic Reduction (SCR), represents the most effective exhaust gas after-treatment method currently available, contributing significantly to the Mercedes-Benz E250‘s clean diesel credentials.
4MATIC: All-Wheel Drive Confidence
Reflecting the growing popularity of all-wheel-drive systems, particularly in the luxury market, the Mercedes-Benz E250 BlueTEC offers the option of 4MATIC four-wheel drive. Modern systems like 4MATIC have become increasingly refined, minimizing weight and fuel efficiency compromises while providing substantial benefits in traction and stability.
The Mercedes-Benz 4MATIC system is seamlessly integrated with the 7-speed automatic transmission of the E250, fitting within the standard body structure and utilizing the existing front suspension. Innovative engineering measures have further improved fuel efficiency by minimizing the energy required to operate the additional gears and shafts. Mercedes-Benz anticipated a balanced take rate between rear-wheel drive and 4MATIC for the E250 BlueTEC, with higher adoption rates expected in regions with more demanding winter driving conditions.
Intelligent Drive: Industry-Leading Safety
Mercedes-Benz prioritizes real-world safety, aiming for accident-free driving. The E-Class embodies this commitment through its Intelligent Drive suite, encompassing over 30 standard and optional active and passive safety systems.
The Driver Assistance Package, available for the Mercedes-Benz E-Class, including the E250, further enhances safety with features like:
- DISTRONIC PLUS with Steering Assist: An advanced radar-based cruise control system that provides semi-autonomous steering inputs, functional from 0-124 mph depending on road conditions.
- PRE-SAFE Brake with pedestrian detection: Utilizes radar and stereo cameras to detect vehicles and pedestrians ahead, adjusting braking force and applying full brakes if necessary to mitigate or prevent collisions.
- PRE-SAFE PLUS: Employs rear-facing radar to anticipate potential rear-end collisions, preparing the vehicle to minimize injury risk for occupants in such events.
- BAS PLUS with Cross Traffic Assist: Stereo cameras detect cross-traffic situations, providing appropriate brake assistance to the driver.
- Active Lane Keeping Assist and Active Blind Spot Protection: These systems intervene with corrective one-sided braking to help keep the vehicle within its lane and avoid collisions with vehicles in blind spots.
E250 BlueTEC: The Entry Point to E-Class Luxury
The Mercedes-Benz E250 BlueTEC sedan serves as the price-leading model within the E-Class lineup, making luxury and advanced diesel technology accessible at a competitive starting price of $51,400 (excluding destination and delivery). This positions the Mercedes-Benz E250 as an attractive option for buyers seeking a well-rounded luxury sedan that excels in fuel efficiency without compromising on performance, safety, or the renowned Mercedes-Benz driving experience. The 2014 E-Class portfolio offered a wide range of models, with the E250 BlueTEC highlighting the brand’s commitment to innovation and efficiency in the luxury segment.
