The Mercedes-Benz E 350d 9G-TRONIC, produced from September 2018 to 2020, represents a significant iteration within the W213 E-Class generation. Positioned as a premium executive sedan, this variant focused on blending performance with diesel efficiency, catering to drivers seeking a refined and powerful driving experience. It occupied a middle-to-upper position in the E-Class lineup, offering a step up in performance from the E 220d while remaining more accessible than the outright performance-oriented AMG models. The W213 E-Class, launched in 2016, brought a new level of technology and comfort to the traditionally conservative E-Class formula, and the E 350d exemplified this evolution.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class (W213) |
| Type (Engine) | E 350d (286 Hp) 9G-TRONIC |
| Start of production | September, 2018 |
| End of production | 2020 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption at Low speed (WLTP) | 6 l/100 km (39.2 US mpg, 47.1 UK mpg, 16.7 km/l) |
| Fuel consumption at very high speed (WLTP) | 6.9 l/100 km (34.1 US mpg, 40.9 UK mpg, 14.5 km/l) |
| CO2 emissions (WLTP) | 158-180 g/km |
| Fuel consumption (economy) – urban | 6.3-6.4 l/100 km (37.3 – 36.8 US mpg, 44.8 – 44.1 UK mpg, 15.9 – 15.6 km/l) |
| Fuel consumption (economy) – extra urban | 4.6-4.8 l/100 km (51.1 – 49 US mpg, 61.4 – 58.9 UK mpg, 21.7 – 20.8 km/l) |
| Fuel consumption (economy) – combined | 5.2-5.4 l/100 km (45.2 – 43.6 US mpg, 54.3 – 52.3 UK mpg, 19.2 – 18.5 km/l) |
| CO2 emissions | 138-143 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 5.7 sec |
| Acceleration 0 – 62 mph | 5.7 sec |
| Acceleration 0 – 60 mph | 5.4 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6d-TEMP-EVAP-ISC |
| Weight-to-power ratio | 6.2 kg/Hp, 162 Hp/tonne |
| Weight-to-torque ratio | 2.9 kg/Nm, 339.9 Nm/tonne |
| Power | 286 Hp |
| Power per litre | 97.8 Hp/l |
| Torque | 600 Nm @ 1200-3200 rpm (442.54 lb.-ft. @ 1200-3200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 656.929 |
| Engine displacement | 2925 cm3 (178.49 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 9 l (9.51 US qt | 7.92 UK qt) |
| Coolant | 13 l (13.74 US qt | 11.44 UK qt) |
| Kerb Weight | 1765 kg (3891.16 lbs.) |
| Max. weight | 2480 kg (5467.46 lbs.) |
| Max load | 715 kg (1576.31 lbs.) |
| Trunk (boot) space – minimum | 540 l (19.07 cu. ft.) |
| Fuel tank capacity | 50 l (13.21 US gal | 11 UK gal) |
| Permitted trailer load with brakes (12%) | 2100 kg (4629.71 lbs.) |
| Length | 4923 mm (193.82 in.) |
| Width | 1852 mm (72.91 in.) |
| Width including mirrors | 2065 mm (81.3 in.) |
| Height | 1468 mm (57.8 in.) |
| Wheelbase | 2939 mm (115.71 in.) |
| Front overhang | 841 mm (33.11 in.) |
| Rear overhang | 1143 mm (45 in.) |
| Ride height (ground clearance) | 103 mm (4.06 in.) |
| Approach angle | 15.2° |
| Departure angle | 12.4° |
| Ramp-over (brakeover) angle | 8.7° |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| Front suspension | Independent multi-link suspension |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Electric Steering |
| Tires size | 245/45 R18 |
| Wheel rims size | 8J x 18 |
Powertrain & Engine Architecture
The heart of the E 350d is the OM 656.929, a 2.9-liter inline-six cylinder diesel engine. This engine represented a significant advancement in Mercedes-Benz’s diesel technology, featuring a steel piston design, a two-stage turbocharging system, and a CAMMATIC variable valve train. The CAMMATIC system allowed for continuously variable valve lift, optimizing engine performance and efficiency across a wider range of operating conditions. Fuel is delivered via a common-rail direct injection system operating at extremely high pressures, ensuring precise fuel atomization and combustion. The engine produces 286 horsepower and a substantial 600 Nm (442.54 lb.-ft.) of torque between 1200 and 3200 rpm. This broad torque curve contributes to effortless acceleration and strong in-gear performance. Paired with the engine is the 9G-TRONIC nine-speed automatic transmission. This transmission is known for its smooth shifts and wide gear ratio spread, contributing to both fuel efficiency and responsive acceleration. The 9G-TRONIC features a torque converter lockup clutch that engages early and often, minimizing slippage and improving efficiency.
Driving Characteristics
The E 350d 9G-TRONIC delivers a refined and comfortable driving experience. The abundant torque from the inline-six diesel engine provides strong acceleration from a standstill and effortless overtaking capability. The nine-speed automatic transmission is generally smooth and responsive, although some drivers noted occasional hesitancy during downshifts. The gear ratios are well-chosen, keeping the engine within its optimal power band for most driving situations. Compared to the E 220d, the E 350d offers a noticeable performance upgrade, while remaining more fuel-efficient than the gasoline-powered E 350. The rear-wheel-drive configuration provides a balanced feel, although it can be less confident in slippery conditions compared to the available 4MATIC all-wheel-drive system.
Equipment & Trim Levels
The E 350d typically came well-equipped, reflecting its position as a premium model. Standard features included leather upholstery, automatic climate control, a high-resolution infotainment system with navigation, and a suite of driver-assistance technologies such as adaptive cruise control and lane-keeping assist. Optional extras included a panoramic sunroof, premium sound system, massaging seats, and advanced parking assist features. Interior trim options ranged from wood veneers to aluminum accents, allowing buyers to personalize the cabin to their preferences. The dashboard layout was modern and elegant, with a focus on intuitive controls and a high-quality feel.
Chassis & Braking
The W213 E-Class featured a sophisticated chassis design with an independent multi-link suspension at both the front and rear. This suspension setup provided a comfortable ride while maintaining good handling characteristics. The E 350d typically came equipped with ventilated disc brakes on all four wheels, providing ample stopping power. Anti-lock braking system (ABS) and electronic stability control (ESC) were standard features, enhancing safety and control. Steering was via a rack-and-pinion system with electric power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The E 350d was generally well-received by automotive critics, who praised its blend of performance, efficiency, and refinement. It was often seen as a compelling alternative to its rivals from BMW and Audi. Fuel economy was a strong point, with the E 350d achieving respectable figures for a vehicle of its size and performance. Reliability was generally good, although some owners reported issues with the diesel particulate filter (DPF) system, a common concern with modern diesel engines. Compared to the E 220d, the E 350d offered a significant performance boost, justifying the higher price tag for drivers who prioritized power and responsiveness.
Legacy
The OM 656 engine family, including the version found in the E 350d, has proven to be a robust and reliable powertrain. While modern diesel engines face increasing scrutiny regarding emissions, the OM 656’s advanced technology helped it meet stringent emission standards. On the used car market, the E 350d remains a desirable option for buyers seeking a comfortable, well-equipped, and efficient executive sedan. Proper maintenance, including regular DPF regeneration and oil changes, is crucial for ensuring the long-term reliability of this powertrain. The W213 E-Class, and the E 350d in particular, represents a high point in Mercedes-Benz’s diesel technology and continues to offer a compelling driving experience.
