The Mercedes-Benz CLS 500 V8 (408 Hp) 9G-TRONIC 4MATIC, introduced as part of the X218 CLS Shooting Brake facelift in 2014, is a compelling combination of performance, luxury, and practicality within the Mercedes-Benz lineup. Production ran from 2015 to 2018, positioning this variant at the top of the CLS range, offering a substantial upgrade in power and refinement compared to the four-cylinder and V6 models. It targeted buyers desiring a stylish, spacious wagon with genuine sports car-level acceleration and a sophisticated driving experience. The X218 generation, built on the W212 E-Class platform, was significant for pioneering the “shooting brake” body style – a five-door wagon with a sleek, coupe-like roofline – and establishing a unique market segment.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS Shooting Brake (X218, facelift 2014) |
| Type (Engine) | CLS 500 V8 (408 Hp) 9G-TRONIC 4MATIC |
| Start of production | 2015 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 12.7-12.8 l/100 km (18.5 – 18.4 US mpg, 22.2 – 22.1 UK mpg, 7.9 – 7.8 km/l) |
| Fuel consumption (extra urban) | 7.5-7.8 l/100 km (31.4 – 30.2 US mpg, 37.7 – 36.2 UK mpg, 13.3 – 12.8 km/l) |
| Fuel consumption (combined) | 9.3-9.6 l/100 km (25.3 – 24.5 US mpg, 30.4 – 29.4 UK mpg, 10.8 – 10.4 km/l) |
| CO2 emissions | 219-225 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.8 sec |
| Acceleration 0 – 62 mph | 4.8 sec |
| Acceleration 0 – 60 mph | 4.6 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 4.7 kg/Hp, 211.4 Hp/tonne |
| Weight-to-torque ratio | 3.2 kg/Nm, 310.9 Nm/tonne |
| Power | 408 Hp @ 5000-5750 rpm |
| Power per litre | 87.5 Hp/l |
| Torque | 600 Nm @ 1600-4750 rpm (442.54 lb.-ft. @ 1600-4750 rpm) |
| Maximum engine speed | 6300 rpm |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 278.922 |
| Engine displacement | 4663 cm3 (284.55 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 92.9 mm (3.66 in.) |
| Piston Stroke | 86 mm (3.39 in.) |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | BiTurbo, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant | 12.3 l (13 US qt | 10.82 UK qt) |
| Kerb Weight | 1930 kg (4254.92 lbs.) |
| Max. weight | 2530 kg (5577.7 lbs.) |
| Max load | 600 kg (1322.77 lbs.) |
| Trunk (boot) space – minimum | 590 l (20.84 cu. ft.) |
| Trunk (boot) space – maximum | 1550 l (54.74 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%) | 2100 kg (4629.71 lbs.) |
| Permitted trailer load without brakes | 750 kg (1653.47 lbs.) |
| Length | 4953 mm (195 in.) |
| Width | 1881 mm (74.06 in.) |
| Width including mirrors | 2075 mm (81.69 in.) |
| Height | 1419 mm (55.87 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1596 mm (62.83 in.) |
| Rear (Back) track | 1629 mm (64.13 in.) |
| Front overhang | 898 mm (35.35 in.) |
| Rear overhang | 1181 mm (46.5 in.) |
| Drag coefficient (Cd) | 0.3 |
| Minimum turning circle (turning diameter) | 11.53 m (37.83 ft.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives permanently the four wheels of the vehicle. |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 9 gears, automatic transmission G-TRONIC |
| Front suspension | Independent type McPherson |
| 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 | 255/40 R18 |
| Wheel rims size | 18 |
Powertrain & Engine Architecture
The CLS 500 V8’s core is the M278.922 4.7-liter twin-turbocharged V8 engine. This engine, a cornerstone of Mercedes-Benz performance during this era, employs direct fuel injection and a sophisticated multi-spark ignition system. The twin turbochargers, nestled within the V of the engine, deliver rapid response and minimize turbo lag. It generates 408 horsepower at 5000-5750 rpm and a robust 600 Nm (442.54 lb-ft) of torque from a low 1600 rpm, providing effortless acceleration in almost any scenario. The engine is mated to a 9G-TRONIC nine-speed automatic transmission. This transmission, known for its smooth shifts and broad gear ratio spread, enhances both performance and fuel efficiency. The 4MATIC all-wheel-drive system distributes power between the front and rear axles, improving traction and stability, especially in challenging weather.
Driving Characteristics
The CLS 500 V8 offers a distinctly different driving experience compared to the lower-powered variants. The abundant torque allows for quick acceleration without frequent downshifts. The 9G-TRONIC transmission is programmed for smooth, nearly imperceptible gear changes in Comfort mode, while Sport mode provides quicker shifts and a more engaging feel. While not as overtly sporty as dedicated performance cars, the CLS 500 V8 provides a confident and composed ride, with precise steering and controlled body roll. The all-wheel-drive system inspires confidence, delivering excellent grip in various conditions. Compared to the CLS 400 (V6), the V8 offers significantly more power and a more refined engine sound. The V8 also feels more relaxed at highway speeds, requiring less effort to maintain momentum.
Equipment & Trim Levels
The CLS 500 V8 typically came generously equipped as standard. Features included leather upholstery, heated and ventilated front seats, a premium sound system, a navigation system, and a panoramic sunroof. Optional extras included advanced driver-assistance systems like adaptive cruise control, lane-keeping assist, and a 360-degree camera. Interior trim options ranged from wood veneers to carbon fiber, allowing buyers to personalize the cabin. The CLS 500 V8 generally represented a high level of luxury and technology, positioning it as a premium offering within the CLS range.
Chassis & Braking
The CLS 500 V8 utilizes an independent suspension system at all four corners, with a McPherson strut setup at the front and a multi-link setup at the rear. This configuration provides a comfortable ride while maintaining good handling. The braking system features ventilated discs on all four wheels, providing ample stopping power. The electronic stability program (ESP) and anti-lock braking system (ABS) are standard, enhancing safety and control. The suspension was tuned to balance comfort and handling, leaning towards comfort given the car’s grand touring nature.
Market Reception & Comparison
The CLS 500 V8 was generally well-received by automotive critics, who praised its powerful engine, luxurious interior, and stylish design. Some reviewers noted the ride could be firm on certain road surfaces, and fuel economy, while respectable for a V8, wasn’t exceptional. Compared to competitors like the Audi A7 Sportback and BMW 6 Series Gran Coupe, the CLS 500 V8 offered a unique blend of style, space, and performance. The CLS Shooting Brake’s distinctive body style also set it apart from the competition.
Legacy
The M278 V8 engine, while complex, has proven relatively reliable with proper maintenance. Occasional turbocharger failures and oil leaks have been reported, but these aren’t widespread. The 9G-TRONIC transmission has also demonstrated good durability. Today, the CLS 500 V8 represents a compelling value on the used car market, offering a significant amount of performance and luxury for the price. Its distinctive styling and spacious interior continue to appeal to buyers seeking a unique and sophisticated grand tourer. The X218 generation CLS, and particularly the 500 V8 variant, is increasingly recognized as a modern classic, representing a high point in Mercedes-Benz design and engineering.
