The Mercedes-Benz CLS 500 V8 (408 Hp) 7G-TRONIC PLUS, part of the X218 Shooting Brake generation produced between 2012 and 2014, represented a unique blend of luxury, performance, and practicality within the Mercedes-Benz lineup. This variant combined a potent twin-turbocharged V8 engine with the convenience of a seven-speed automatic transmission, packaged in the stylish and relatively uncommon body style of a five-door coupe – or “shooting brake” as Mercedes termed it. Positioned as a high-end offering within the CLS range, it catered to buyers seeking a more dynamic and spacious alternative to traditional coupes and sedans.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | CLS |
| Generation | CLS Shooting Brake (X218) |
| Type (Engine) | CLS 500 V8 (408 Hp) 7G-TRONIC PLUS |
| Start of production | 2012 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Station wagon (estate) |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 12.8-12.7 l/100 km (18.4 – 18.5 US mpg) |
| Fuel consumption (extra urban) | 7.2-7.1 l/100 km (32.7 – 33.1 US mpg) |
| Fuel consumption (combined) | 9.3-9.2 l/100 km (25.3 – 25.6 US mpg) |
| CO2 emissions | 216-214 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 5 sec |
| Acceleration 0 – 62 mph | 5 sec |
| Acceleration 0 – 60 mph | 4.8 sec |
| Maximum speed | 250 km/h (155.34 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 4.8 kg/Hp |
| Weight-to-torque ratio | 3.3 kg/Nm |
| Power | 408 Hp @ 5000-5750 rpm |
| Torque | 600 Nm @ 1600-4750 rpm (442.54 lb.-ft. @ 1600-4750 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 |
| Compression ratio | 10.5:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Direct injection |
| Engine aspiration | Twin-Turbo, Intercooler |
| Engine oil capacity | 8 l (8.45 US qt | 7.04 UK qt) |
| Coolant capacity | 12.3 l (13 US qt | 10.82 UK qt) |
| Kerb Weight | 1955 kg (4310.04 lbs.) |
| Max. weight | 2480 kg (5467.46 lbs.) |
| Max load | 525 kg (1157.43 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) |
| Length | 4956 mm (195.12 in.) |
| Width | 1881 mm (74.06 in.) |
| Height | 1416 mm (55.75 in.) |
| Wheelbase | 2874 mm (113.15 in.) |
| Front track | 1596 mm (62.83 in.) |
| Rear track | 1626 mm (64.02 in.) |
| Minimum turning circle | 11.27 m (36.98 ft.) |
| Drivetrain | Rear wheel drive |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC PLUS |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Tire size | 255/40 R18 |
| Wheel rims size | 18 |
INTRODUCTION
The CLS 500 V8 Shooting Brake, introduced in 2012, was a late addition to the X218 series, which had launched in 2010. Mercedes-Benz responded to market demand for a more practical CLS by creating the shooting brake variant, offering increased cargo capacity without sacrificing the sleek, coupe-like profile. The 500 V8 model sat at the top of the performance hierarchy for the X218 Shooting Brake, offering a significant step up in power and refinement compared to the 350 and 400 models. It was primarily sold in European markets, with limited availability in North America.
Powertrain & Engine Architecture
At the heart of the CLS 500 V8 lay the M278.922 engine, a 4.6-liter, twin-turbocharged V8. This engine was a cornerstone of Mercedes-Benz’s high-performance offerings during this period. The M278 featured direct fuel injection, a compression ratio of 10.5:1, and four valves per cylinder. The twin turbochargers, strategically positioned within the V of the engine, minimized turbo lag and provided a broad, flat torque curve. The 7G-TRONIC PLUS seven-speed automatic transmission was specifically tuned to handle the engine’s substantial output. This transmission offered smooth, quick shifts and a wide range of gear ratios, optimizing both performance and fuel efficiency. The transmission also included a manual shift mode for more driver involvement.
Driving Characteristics
The CLS 500 V8 delivered a refined yet potent driving experience. The twin-turbo V8 provided effortless acceleration, with 0-60 mph times consistently around 4.8 seconds. The 7G-TRONIC PLUS transmission contributed to this performance, providing seamless gear changes. Compared to the CLS 400 (with its naturally aspirated V6), the 500 V8 offered significantly more low-end torque, making overtaking maneuvers easier and more confident. While not as overtly sporty as some competitors, the CLS 500 V8 prioritized comfort and grand touring capabilities. The suspension, tuned for a balance between ride quality and handling, absorbed bumps effectively while maintaining reasonable body control. The rear-wheel-drive configuration provided a traditional driving feel, although it could be less forgiving in slippery conditions.
Equipment & Trim Levels
The CLS 500 V8 came standard with a comprehensive list of luxury features. Interior appointments typically included leather upholstery, wood trim, and a premium sound system. Standard equipment also included features like dual-zone automatic climate control, power-adjustable seats with memory function, and a navigation system. Optional extras included features like a panoramic sunroof, adaptive cruise control, lane-keeping assist, and a more advanced sound system from Bang & Olufsen. The interior design was characterized by Mercedes-Benz’s signature blend of elegance and technology, with a focus on high-quality materials and craftsmanship.
Chassis & Braking
The CLS 500 V8 utilized an independent suspension system at all four corners. The front suspension employed a McPherson strut design, while the rear featured a multi-link setup. This configuration provided a comfortable ride and good handling characteristics. Braking duties were handled by ventilated discs at 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 steering system was a rack-and-pinion setup with electric power assistance, offering precise and responsive steering feel.
Market Reception & Comparison
The CLS 500 V8 Shooting Brake was generally well-received by automotive critics. Reviewers praised its powerful engine, luxurious interior, and unique styling. However, some noted its relatively high price and the limited practicality of the shooting brake body style compared to a traditional station wagon. Compared to the CLS 400, the 500 V8 offered a significant performance advantage but came at a higher cost. Fuel economy was also lower with the V8 engine. Against competitors like the Audi A7 Sportback and BMW 5 Series Gran Turismo, the CLS 500 V8 stood out for its distinctive styling and luxurious appointments.
Legacy
The M278 engine, found in the CLS 500 V8, has proven to be a relatively reliable powerplant when properly maintained. Common issues include occasional turbocharger problems and oil leaks, but these are not widespread. The 7G-TRONIC PLUS transmission is also generally durable, although regular fluid changes are essential. On the used car market, the CLS 500 V8 Shooting Brake remains a desirable option for buyers seeking a unique and luxurious grand tourer. Its combination of performance, style, and practicality continues to appeal to enthusiasts, although maintenance costs can be higher than those of more mainstream vehicles.
