The Mercedes-Benz E 350 BlueTEC 4MATIC, produced from July 2014 to January 2016, represents a significant iteration of the W212 E-Class facelift. This variant combined a powerful and efficient diesel engine with a sophisticated all-wheel-drive system and a then-new nine-speed automatic transmission. Positioned as a mid-to-upper trim level within the E-Class range, it aimed to deliver a blend of performance, luxury, and fuel economy for discerning buyers in markets where diesel sedans remained popular, including Europe and parts of Asia. While not a primary focus for the North American market, the E 350 BlueTEC offered a compelling alternative to gasoline-powered competitors.
| Brand | Mercedes-Benz |
| Model | E-Class |
| Generation | E-Class (W212, facelift 2013) |
| Type | E 350 BlueTEC V6 (258 Hp) 4MATIC 9G-TRONIC |
| Start of production | July, 2014 |
| End of production | January, 2016 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 6.5-7 l/100 km (36.2 – 33.6 US mpg) |
| Fuel consumption (extra urban) | 5.2-5.5 l/100 km (45.2 – 42.8 US mpg) |
| Fuel consumption (combined) | 5.7-6 l/100 km (41.3 – 39.2 US mpg) |
| CO2 emissions | 150-156 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 6.6 sec |
| Acceleration 0 – 60 mph | 6.3 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 7.1 kg/Hp |
| Weight-to-torque ratio | 3 kg/Nm |
| Power | 258 Hp @ 3400 rpm |
| Torque | 620 Nm @ 1600-2400 rpm (457.29 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.852 |
| Engine displacement | 2987 cm3 (182.28 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant capacity | 10.8 l (11.41 US qt | 9.5 UK qt) |
| Kerb Weight | 1840 kg (4056.51 lbs.) |
| Max. weight | 2460 kg (5423.37 lbs.) |
| Max load | 620 kg (1366.87 lbs.) |
| Trunk (boot) space | 490 l (17.3 cu. ft.) |
| Fuel tank capacity | 59 l (15.59 US gal | 12.98 UK gal) |
| AdBlue tank | 25.5 l (6.74 US gal | 5.61 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load (braked) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Length | 4879 mm (192.09 in.) |
| Width | 1854 mm (72.99 in.) |
| Width including mirrors | 2071 mm (81.54 in.) |
| Height | 1474 mm (58.03 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1598 mm (62.91 in.) |
| Rear track | 1614 mm (63.54 in.) |
| Gearbox | 9 gears, automatic transmission G-TRONIC |
Powertrain & Engine Architecture
The heart of the E 350 BlueTEC was the OM 642.852 3.0-liter V6 diesel engine. This engine was a mainstay of the Mercedes-Benz lineup, known for its robust construction and refined operation. It featured a common-rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. The engine employed a variable geometry turbocharger (VGT) and an intercooler to boost power and efficiency. The V6 configuration provided inherent smoothness, and the engine was further enhanced by a double overhead camshaft (DOHC) valvetrain. The ‘BlueTEC’ designation indicated the inclusion of advanced emissions control technologies, including a selective catalytic reduction (SCR) system utilizing AdBlue (diesel exhaust fluid) to reduce nitrogen oxide (NOx) emissions, ensuring compliance with stringent Euro 6 standards. Paired with this engine was the 9G-TRONIC nine-speed automatic transmission. This transmission offered a wider range of gear ratios compared to traditional automatics, contributing to improved fuel economy and smoother acceleration. The 9G-TRONIC was designed for both comfort and efficiency, with the ability to skip gears under certain conditions to optimize performance.
Driving Characteristics
The E 350 BlueTEC 4MATIC delivered a distinctly different driving experience compared to its gasoline-powered siblings or even other diesel variants with manual transmissions. The 620 Nm (457 lb-ft) of torque, available from a low 1600 rpm, provided strong and readily accessible pulling power. The 9G-TRONIC transmission, while generally smooth, could sometimes feel hesitant during quick downshifts, a characteristic noted by some reviewers. The all-wheel-drive system (4MATIC) provided excellent traction in all weather conditions, enhancing stability and confidence. Acceleration to 60 mph was achieved in approximately 6.3 seconds, making it a reasonably quick sedan. However, the focus was less on outright speed and more on effortless cruising and relaxed performance. The long gear ratios in the 9G-TRONIC prioritized fuel efficiency at highway speeds, resulting in a quiet and comfortable ride.
Equipment & Trim Levels
The E 350 BlueTEC 4MATIC typically came well-equipped, reflecting its position as a mid-to-upper trim level. Standard features included leather upholstery, automatic climate control, a premium audio system, and a suite of safety technologies such as adaptive cruise control, lane keeping assist, and automatic emergency braking. Optional extras included a panoramic sunroof, upgraded interior trim materials (wood or aluminum), a head-up display, and a more advanced navigation system. The interior design followed the elegant and understated aesthetic typical of Mercedes-Benz, with a focus on high-quality materials and meticulous craftsmanship. Dashboard configurations were largely consistent across the W212 facelift range, with a central infotainment screen and analog gauges.
Chassis & Braking
The E 350 BlueTEC utilized a sophisticated suspension system designed to balance comfort and handling. The front suspension featured a multi-link setup with coil springs, while the rear suspension employed a multi-link independent suspension. Air suspension was available as an option, further enhancing ride quality and allowing for adjustable ride height. Braking duties were handled by ventilated discs on all four wheels, providing ample stopping power. The anti-lock braking system (ABS) and electronic stability program (ESP) were standard features, contributing to enhanced safety. Steering was power-assisted and offered a precise and responsive feel.
Market Reception & Comparison
The E 350 BlueTEC 4MATIC generally received positive reviews from automotive critics. It was praised for its fuel efficiency, refined engine, and comfortable ride. However, some reviewers noted the slightly hesitant behavior of the 9G-TRONIC transmission and the relatively high price compared to gasoline-powered alternatives. Compared to the E 250 BlueTEC (a lower-powered diesel variant), the E 350 offered significantly more performance. Compared to the E 350 gasoline model, the BlueTEC provided superior fuel economy and a different driving character, prioritizing torque over peak horsepower. Reliability was generally good, although the complex emissions control systems required periodic maintenance.
Legacy
The OM 642 engine family, including the OM 642.852 found in the E 350 BlueTEC, has proven to be remarkably durable. Well-maintained examples continue to provide reliable service today. The 9G-TRONIC transmission, while initially experiencing some software glitches, has also proven to be a robust unit. In the used car market, the E 350 BlueTEC 4MATIC remains a desirable option for buyers seeking a comfortable, efficient, and well-equipped luxury sedan. However, potential buyers should be aware of the maintenance requirements of the diesel emissions system, including the need for regular AdBlue refills and potential repairs to the SCR system. The combination of a powerful diesel engine, all-wheel drive, and a nine-speed automatic transmission made this variant a compelling choice for those prioritizing long-distance comfort and fuel economy.
