The Mercedes-Benz M-Class (W164), particularly the facelifted version introduced in 2008, represented a significant step forward for the German automaker in the burgeoning mid-size luxury SUV segment. The ML 280 CDI 4MATIC, powered by a 3.0-liter V6 turbodiesel engine producing 190 horsepower and paired with a 7G-TRONIC automatic transmission, was a key variant offered primarily in European and other international markets. Production of this specific configuration ran from 2008 to 2009, positioning it as a more economical and fuel-efficient alternative to the higher-performance ML 350 and ML 500 models. It aimed to attract buyers seeking the prestige and practicality of the M-Class without the higher running costs associated with the larger gasoline engines.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | M-Class |
| Generation | M-Class (W164, facelift 2008) |
| Type (Engine) | ML 280 CDI V6 (190 Hp) 4MATIC 7G-TRONIC |
| Start of production | 2008 |
| End of production | 2009 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 11.8-12.8 l/100 km (19.9 – 18.4 US mpg) |
| Fuel consumption (extra urban) | 7.6-7.8 l/100 km (30.9 – 30.2 US mpg) |
| Fuel consumption (combined) | 9.1-9.6 l/100 km (25.8 – 24.5 US mpg) |
| CO2 emissions | 241-254 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 9.8 sec |
| Acceleration 0 – 62 mph | 9.8 sec |
| Acceleration 0 – 60 mph | 9.3 sec |
| Maximum speed | 205 km/h (127.38 mph) |
| Emission standard | Euro 4 |
| Weight-to-power ratio | 11.1 kg/Hp |
| Weight-to-torque ratio | 4.8 kg/Nm |
| Power | 190 Hp @ 4000 rpm |
| Torque | 440 Nm @ 1400-2800 rpm (324.53 lb.-ft.) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 642.940 |
| Engine displacement | 2987 cm3 (182.28 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | V-engine |
| Cylinder Bore | 83 mm (3.27 in.) |
| Piston Stroke | 92 mm (3.62 in.) |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 8.5 l (8.98 US qt | 7.48 UK qt) |
| Coolant capacity | 9.5 l (10.04 US qt | 8.36 UK qt) |
| Kerb Weight | 2110 kg (4651.75 lbs.) |
| Max. weight | 2830 kg (6239.08 lbs.) |
| Max load | 720 kg (1587.33 lbs.) |
| Trunk (boot) space – minimum | 833 l (29.42 cu. ft.) |
| Trunk (boot) space – maximum | 2050 l (72.4 cu. ft.) |
| Fuel tank capacity | 95 l (25.1 US gal | 20.9 UK gal) |
| Length | 4781 mm (188.23 in.) |
| Width | 1911 mm (75.24 in.) |
| Width including mirrors | 2124 mm (83.62 in.) |
| Height | 1815 mm (71.46 in.) |
| Wheelbase | 2915 mm (114.76 in.) |
| Front track | 1627 mm (64.06 in.) |
| Rear track | 1629 mm (64.13 in.) |
| Front overhang | 866 mm (34.09 in.) |
| Rear overhang | 1000 mm (39.37 in.) |
| Ride height (ground clearance) | 210 mm (8.27 in.) |
| Drag coefficient (Cd) | 0.35 |
| Minimum turning circle | 11.6 m (38.06 ft.) |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Number of gears | 7 |
| Gearbox type | Automatic transmission G-TRONIC |
Powertrain & Engine Architecture
The ML 280 CDI utilized the OM 642.940 3.0-liter V6 diesel engine, a powerplant well-regarded for its refinement and durability. This engine featured a common rail direct injection system, delivering fuel at extremely high pressures for optimized combustion. A variable geometry turbocharger (VGT) and intercooler were employed to boost power and torque while minimizing turbo lag. The engine also incorporated a diesel particulate filter (DPF) to reduce emissions, complying with Euro 4 standards. The 7G-TRONIC automatic transmission, a seven-speed unit, provided smooth and efficient gear changes. This transmission was known for its adaptability, offering both comfort and sport modes, and contributing to the vehicle’s relatively good fuel economy for its size.
Driving Characteristics
The ML 280 CDI 4MATIC offered a comfortable and composed driving experience. While not overtly sporty, the 190 horsepower and 440 Nm (324 lb-ft) of torque provided adequate performance for everyday driving and highway cruising. Acceleration from 0-60 mph took around 9.3 seconds, which was respectable for a vehicle of its size and weight. The 7G-TRONIC transmission was well-matched to the engine, providing seamless shifts and helping to keep the engine in its optimal power band. Compared to the more powerful ML 350, the 280 CDI felt less urgent in acceleration, but it offered significantly better fuel economy. The 4MATIC all-wheel-drive system provided enhanced traction and stability, particularly in adverse weather conditions.
Equipment & Trim Levels
The ML 280 CDI 4MATIC typically came equipped with a generous array of standard features, including automatic climate control, power-adjustable front seats, a multi-function steering wheel, and a premium audio system. Leather upholstery was often standard, as were alloy wheels. Optional extras included a sunroof, navigation system, upgraded audio, and parking sensors. The interior design was typical of Mercedes-Benz at the time, emphasizing luxury and build quality. The facelifted W164 models benefited from revised interior trim and updated infotainment systems compared to the pre-facelift versions.
Chassis & Braking
The W164 M-Class featured a robust chassis with independent suspension all around. The front suspension utilized a double wishbone setup, while the rear employed a multi-link design. Stabilizer bars were fitted front and rear to reduce body roll. The ML 280 CDI was equipped with ventilated disc brakes at the front and solid discs at the rear. Anti-lock braking system (ABS) and electronic stability control (ESP) were standard safety features. The suspension tuning prioritized comfort, but still provided a reasonably controlled ride, even when fully loaded.
Market Reception & Comparison
The ML 280 CDI 4MATIC was generally well-received by automotive critics, who praised its fuel efficiency, comfortable ride, and refined engine. It was seen as a sensible choice for buyers who prioritized practicality and economy over outright performance. Compared to the ML 350, the 280 CDI offered significantly better fuel economy, making it a more attractive option for those covering long distances. However, some critics noted that the engine could feel a little underpowered when fully loaded or tackling steep hills. Reliability was generally good, although the diesel particulate filter (DPF) could require occasional maintenance.
Legacy
The OM 642 engine family, including the version used in the ML 280 CDI, has proven to be remarkably durable and reliable. These engines are known to withstand high mileage with proper maintenance. Today, used examples of the ML 280 CDI 4MATIC can be found at relatively affordable prices. While they may require some age-related maintenance, they offer a compelling combination of luxury, practicality, and fuel efficiency. The 7G-TRONIC transmission is also generally reliable, but regular fluid changes are essential to ensure its longevity. The W164 M-Class, and the ML 280 CDI in particular, represents a solid and well-engineered SUV that continues to offer good value in the used car market.
