The Mercedes-Benz E 550 V8 (382 hp) represented a high-performance variant within the W212 E-Class range, produced between 2009 and 2011. Positioned as a step up from the E 350 and serving as a more accessible alternative to the full-fledged AMG models, the E 550 combined substantial power with a focus on luxury and grand touring capability. It was primarily marketed in North America and other markets where larger displacement engines were favored, offering a blend of performance and refinement expected from the Mercedes-Benz brand.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class (W212) |
| Type (Engine) | E 550 V8 (382 Hp) 7G-TRONIC |
| Start of production | 2009 |
| End of production | 2011 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (economy) – urban (EPA) | 15.7 l/100 km (15 US mpg, 18 UK mpg, 6.4 km/l) |
| Fuel consumption (economy) – extra urban (EPA) | 10.2 l/100 km (23.1 US mpg, 27.7 UK mpg, 9.8 km/l) |
| Fuel consumption (economy) – combined (EPA) | 13.1 l/100 km (18 US mpg, 21.6 UK mpg, 7.6 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 60 mph | 5.2 sec |
| Maximum speed | 210 km/h (130.49 mph), Electronically limited |
| Weight-to-power ratio | 4.8 kg/Hp, 208.7 Hp/tonne |
| Weight-to-torque ratio | 3.5 kg/Nm, 289.6 Nm/tonne |
| Power | 382 Hp @ 6000 rpm |
| Power per litre | 70 Hp/l |
| Torque | 530 Nm @ 2800-4800 rpm (390.91 lb.-ft. @ 2800-4800 rpm) |
| Maximum engine speed | 6500 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 273.971 |
| Engine displacement | 5461 cm3 (333.25 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 98 mm (3.86 in.) |
| Piston Stroke | 90.5 mm (3.56 in.) |
| Compression ratio | 10.7:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Coolant | 10.3 l (10.88 US qt | 9.06 UK qt) |
| Kerb Weight | 1830-1884 kg (4034.46 – 4153.51 lbs.) |
| Trunk (boot) space – minimum | 540 l (19.07 cu. ft.) |
| Fuel tank capacity | 80 l (21.13 US gal | 17.6 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load with brakes (12%) | 1588 kg (3500.94 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4868 mm (191.65 in.) |
| Width | 1854 mm (72.99 in.) |
| Width with mirrors folded | 1927 mm (75.87 in.) |
| Width including mirrors | 2071 mm (81.54 in.) |
| Height | 1447 mm (56.97 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1580-1587 mm (62.2 – 62.48 in.) |
| Rear (Back) track | 1587-1599 mm (62.48 – 62.95 in.) |
| Front overhang | 841 mm (33.11 in.) |
| Rear overhang | 1153 mm (45.39 in.) |
| Ride height (ground clearance) | 140 mm (5.51 in.) |
| Drag coefficient (Cd) | 0.28 |
| Minimum turning circle (turning diameter) | 11.25 m (36.91 ft.) |
| 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 | 7 gears, automatic transmission G-TRONIC |
| Front suspension | Independent multi-link suspension, Transverse stabilizer, Air suspension |
| Rear suspension | Independent multi-link suspension, Air suspension, Transverse stabilizer |
| Front brakes | Ventilated discs, 344×32 mm |
| Rear brakes | Ventilated discs, 320×24 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 245/45 R17; 245/40 R18Rear wheel tires: 245/45 R17; 265/35 R18 |
| Wheel rims size | Front wheel rims: 7J x 18; 8.5J x 18Rear wheel rims: 7J x 18; 9J x 18 |
INTRODUCTION
The E 550 V8, introduced in 2009 as part of the W212 E-Class facelift, offered a significant performance upgrade over the base E 350 models. It slotted into the lineup below the high-performance E 63 AMG, providing a more luxurious and refined driving experience while still delivering impressive acceleration. The W212 generation, produced from 2009 to 2016, represented a significant evolution in Mercedes-Benz’s mid-size executive car, incorporating advanced technology and a more modern design language. The E 550 was primarily aimed at buyers in markets like North America who desired a powerful, comfortable sedan without the overtly sporty character of the AMG variants.
Powertrain & Engine Architecture
At the heart of the E 550 lay the M273.971 5.5-liter naturally aspirated V8 engine. This engine, a cornerstone of Mercedes-Benz’s powertrain lineup for several years, featured a three-valve per cylinder design (two intake, one exhaust) and a relatively high 10.7:1 compression ratio. Fuel delivery was handled by a multi-port fuel injection system, optimized for smooth power delivery and efficiency. The engine produced 382 horsepower at 6000 rpm and 390 lb-ft of torque between 2800 and 4800 rpm. The M273 engine was known for its smooth operation and distinctive V8 sound.
The engine was paired exclusively with the 7G-TRONIC seven-speed automatic transmission. This transmission, a sophisticated unit for its time, offered smooth and quick shifts, contributing to the E 550’s refined driving experience. The 7G-TRONIC featured a torque converter lock-up clutch that engaged in most gears, improving fuel efficiency. Gear ratios were tuned to balance acceleration and highway cruising comfort. The transmission also included a manual shift mode, allowing drivers to exert more control over gear selection.
Driving Characteristics
The E 550 V8 delivered a noticeably different driving experience compared to the E 350. The substantial torque output of the V8 engine provided effortless acceleration in all situations. The 0-60 mph sprint was dispatched in around 5.2 seconds, making it a genuinely quick sedan. While not as aggressively tuned as the E 63 AMG, the E 550 offered ample power for overtaking and highway merging. The 7G-TRONIC transmission contributed to a smooth and refined driving experience, with seamless gear changes. Compared to a manual transmission equipped E-Class, the automatic prioritized comfort and ease of use over outright driver engagement. The air suspension, often equipped on E 550 models, further enhanced ride quality, absorbing bumps and providing a comfortable ride even on imperfect road surfaces.
Equipment & Trim Levels
The E 550 typically came well-equipped with a range of luxury features as standard. These included leather upholstery, wood trim, a premium sound system, dual-zone automatic climate control, and power-adjustable front seats with memory function. Optional extras included a panoramic sunroof, a navigation system, rear-seat entertainment, and advanced driver-assistance systems such as adaptive cruise control and lane-keeping assist. Interior color schemes were typically conservative, reflecting the E-Class’s focus on understated elegance. The E 550 often featured unique badging and exterior trim elements to distinguish it from other E-Class models.
Chassis & Braking
The E 550 utilized a sophisticated chassis design featuring an independent multi-link suspension at all four corners. Many models were equipped with Mercedes-Benz’s AIRMATIC air suspension system, which allowed for adjustable ride height and damping. This system provided a comfortable ride while also enhancing handling and stability. Braking duties were handled by 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. The E 550’s suspension was tuned to provide a balance between comfort and handling, prioritizing a smooth ride over aggressive cornering performance.
Market Reception & Comparison
The E 550 V8 was generally well-received by automotive critics. It was praised for its powerful engine, smooth transmission, and luxurious interior. However, some reviewers noted that its fuel economy was relatively poor compared to the E 350 or the E 350 BlueTec diesel. Compared to the E 63 AMG, the E 550 offered a more refined and comfortable driving experience, but lacked the AMG’s outright performance and aggressive styling. The E 550’s target audience was buyers who wanted a powerful and luxurious sedan without the higher price tag and more aggressive character of the AMG models.
Legacy
The M273 engine, while known for its smoothness and power, has demonstrated some long-term reliability concerns, particularly related to the valve cover gaskets and timing chain tensioners. However, with proper maintenance, these engines can remain reliable for many years. Today, the W212 E 550 V8 represents an appealing option in the used car market for buyers seeking a comfortable and powerful luxury sedan. Its combination of performance, refinement, and relatively affordable price point makes it a compelling alternative to newer, more technologically advanced vehicles. The E 550 stands as a testament to Mercedes-Benz’s tradition of building high-quality, luxurious automobiles.
