The Mercedes-Benz CL 550 V8 (382 Hp) 7G-TRONIC, produced between 2006 and 2010, represents a significant iteration of the C216 generation CL-Class. This grand touring coupe aimed to blend luxurious comfort with respectable performance, serving as a flagship model for Mercedes-Benz. Positioned within the C216 range, the CL 550 occupied a middle ground, offering a step up in power and refinement from the CL 500 while remaining more accessible than the range-topping CL 63 AMG and CL 65 AMG models. It was primarily marketed towards buyers seeking a sophisticated, high-performance coupe experience without the overtly aggressive styling or track-focused tuning of the AMG variants.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CL |
| Generation | CL (C216) |
| Type (Engine) | CL 550 V8 (382 Hp) 7G-TRONIC |
| Start of production | 2006 |
| End of production | 2010 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Coupe |
| Seats | 4 |
| Doors | 2 |
| Fuel consumption (urban) | 15.4 l/100 km (15.3 US mpg, 18.3 UK mpg, 6.5 km/l) |
| Fuel consumption (extra urban) | 9.7 l/100 km (24.2 US mpg, 29.1 UK mpg, 10.3 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5.4 sec |
| Acceleration 0 – 62 mph | 5.4 sec |
| Acceleration 0 – 60 mph | 5.1 sec |
| Maximum speed | 250 km/h (155.34 mph), Electronically limited |
| Weight-to-power ratio | 5.3 kg/Hp, 187.7 Hp/tonne |
| Weight-to-torque ratio | 3.8 kg/Nm, 260.4 Nm/tonne |
| Power | 382 Hp @ 6000 rpm |
| Power per litre | 70 Hp/l |
| Torque | 530 Nm @ 3000 rpm (390.91 lb.-ft. @ 3000 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 273 |
| 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 l (8.45 US qt | 7.04 UK qt) |
| Coolant | 11.5 l (12.15 US qt | 10.12 UK qt) |
| Kerb Weight | 2035 kg (4486.41 lbs.) |
| Max. weight | 2510 kg (5533.6 lbs.) |
| Max load | 475 kg (1047.2 lbs.) |
| Trunk (boot) space – minimum | 490 l (17.3 cu. ft.) |
| Fuel tank capacity | 90 l (23.78 US gal | 19.8 UK gal) |
| Length | 5065 mm (199.41 in.) |
| Width | 1871 mm (73.66 in.) |
| Width including mirrors | 2139 mm (84.21 in.) |
| Height | 1418 mm (55.83 in.) |
| Wheelbase | 2955 mm (116.34 in.) |
| Front track | 1601 mm (63.03 in.) |
| Rear (Back) track | 1607 mm (63.27 in.) |
| Front overhang | 917 mm (36.1 in.) |
| Rear overhang | 1193 mm (46.97 in.) |
| Drag coefficient (Cd) | 0.27 |
| Minimum turning circle (turning diameter) | 11.6 m (38.06 ft.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission G-TRONIC |
| Front suspension | Hydraulic elements, Independent multi-link suspension |
| Rear suspension | Hydraulic elements, Independent multi-link suspension |
| Front brakes | Ventilated discs, 335 mm |
| Rear brakes | Ventilated discs, 300 mm |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic Steering |
| Tires size | Front wheel tires: 255/45 R18; 255/40 R19; 255/35 R20Rear wheel tires: 275/45 R18; 275/40 R19; 275/35 R20 |
| Wheel rims size | Front wheel rims: 8.5J x 18; 8.5J x 19; 8.5J x 20Rear wheel rims: 9.5J x 18; 9.5J x 19; 9.5J x 20 |
INTRODUCTION
The CL 550 V8, launched in 2006 as part of the C216 series, continued Mercedes-Benz’s tradition of building luxurious, high-performance coupes. The C216 generation, produced from 2006 to 2010, represented a significant redesign of the CL-Class, incorporating advanced technology and a more modern aesthetic. The CL 550 specifically aimed to provide a balance between performance and comfort, appealing to buyers who desired a powerful engine and refined driving experience without the more aggressive character of the AMG models. It built upon the foundation laid by previous CL generations, offering a sophisticated blend of luxury, technology, and performance.
Powertrain & Engine Architecture
At the heart of the CL 550 lies the M273 engine, a 5.5-liter naturally aspirated V8. This engine, a cornerstone of Mercedes-Benz’s powertrain lineup during the mid-2000s, produces 382 horsepower at 6000 rpm and 530 Nm (390.91 lb.-ft.) of torque at 3000 rpm. The M273 features a three-valve per cylinder design (two intake, one exhaust) and utilizes multi-port fuel injection. It’s known for its smooth power delivery and relatively high reliability. The engine is longitudinally mounted in the front of the vehicle, driving the rear wheels. Paired with the M273 is the 7G-TRONIC automatic transmission, a seven-speed unit that offered smooth and responsive shifting. This transmission was a significant advancement over previous Mercedes-Benz automatics, contributing to improved fuel efficiency and performance. The 7G-TRONIC features a torque converter lock-up clutch that engages in most gears, reducing slippage and improving efficiency.
Driving Characteristics
The CL 550’s driving experience is characterized by a blend of effortless power and refined comfort. The 5.5-liter V8 delivers ample torque throughout the rev range, providing strong acceleration in most driving situations. While not as brutally quick as the AMG variants, the CL 550’s 0-60 mph time of around 5.1 seconds is still respectable. The 7G-TRONIC transmission contributes to a smooth and seamless driving experience, with well-chosen gear ratios that keep the engine in its optimal power band. Compared to the CL 63 AMG, the CL 550 offers a more relaxed and comfortable ride, with less emphasis on outright performance. The suspension, tuned for comfort, absorbs bumps and imperfections in the road effectively. The steering is precise and well-weighted, providing a confident feel at highway speeds. The automatic transmission, while smooth, can sometimes feel a bit hesitant when downshifting for quick overtaking maneuvers compared to the more aggressive programming found in the AMG models.
Equipment & Trim Levels
The CL 550 came standard with a comprehensive array of luxury features. Interior appointments typically included leather upholstery, wood trim, and power-adjustable heated and ventilated front seats. Standard equipment also included a premium sound system, a navigation system, and a sunroof. Optional extras were plentiful, including massaging seats, a rear-seat entertainment system, and advanced driver-assistance features such as Distronic adaptive cruise control and Active Body Control suspension. The interior design emphasized elegance and sophistication, with a focus on high-quality materials and meticulous craftsmanship. Dashboard configuration was generally consistent across CL 550 models, featuring a prominent central display screen and intuitive controls.
Chassis & Braking
The CL 550 utilizes an independent multi-link suspension system at both the front and rear, providing a comfortable and controlled ride. The suspension is hydraulically controlled, further enhancing ride quality. Braking duties are handled by ventilated discs at all four corners. The front brakes measure 335mm in diameter, while the rear brakes are slightly smaller at 300mm. Anti-lock braking system (ABS) is standard, providing enhanced stopping power and stability. The CL 550’s chassis is designed to provide a balance between rigidity and comfort, minimizing body roll during cornering while still absorbing bumps effectively. Stabilizer bars are fitted at both the front and rear to further reduce body roll.
Market Reception & Comparison
The CL 550 was generally well-received by automotive critics, who praised its luxurious interior, comfortable ride, and powerful engine. However, some critics noted that it lacked the sporting character of its AMG counterparts. Fuel economy, while reasonable for a vehicle of its size and performance, was not a strong point, with combined fuel consumption around 12.4 mpg. Compared to the CL 63 AMG, the CL 550 offered a more affordable entry point into the CL-Class range, but at the expense of outright performance. Compared to the CL 500, the CL 550 provided a noticeable increase in power and refinement. Reliability was generally good, although some owners have reported issues with the air suspension system and electronic components.
Legacy
The CL 550 V8 (382 Hp) 7G-TRONIC remains a desirable grand touring coupe in the used car market. The M273 engine, while aging, is generally considered to be reliable if properly maintained. The 7G-TRONIC transmission has also proven to be durable. However, potential buyers should be aware of the potential for issues with the air suspension system and electronic components, which can be expensive to repair. The CL 550 represents a sweet spot in the C216 lineup, offering a compelling combination of luxury, performance, and value. It continues to be appreciated by enthusiasts who value a refined and comfortable driving experience.
