The Mercedes-Benz M-Class (W163) ML 270 CDI 4MATIC, produced from December 1999 to July 2001, represented a key offering in the first generation of Mercedes’ foray into the mid-size luxury SUV segment. Positioned as a diesel-powered alternative within the W163 range, it aimed to provide a balance of fuel efficiency, torque, and all-weather capability. This variant was particularly significant in European markets where diesel engines held a strong preference, offering a compelling alternative to the gasoline-powered ML 320. The ML 270 CDI 4MATIC utilized a five-cylinder diesel engine paired with an automatic transmission and a full-time four-wheel-drive system, making it a practical choice for buyers seeking a versatile and capable SUV.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | M-Class |
| Generation | M-Class (W163) |
| Type (Engine) | ML 270 CDI (163 Hp) 4MATIC |
| Start of production | December, 1999 |
| End of production | July, 2001 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | SUV |
| Seats | 5 |
| Doors | 5 |
| Fuel consumption (urban) | 12.4 l/100 km (19 US mpg, 22.8 UK mpg) |
| Fuel consumption (extra urban) | 7.7 l/100 km (30.5 US mpg, 36.7 UK mpg) |
| Fuel consumption (combined) | 9.4 l/100 km (25 US mpg, 30.1 UK mpg) |
| CO2 emissions | 248 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 11.7 sec |
| Acceleration 0 – 62 mph | 11.7 sec |
| Acceleration 0 – 60 mph | 11.1 sec |
| Maximum speed | 185 km/h (114.95 mph) |
| Emission standard | Euro 3 |
| Weight-to-power ratio | 12.5 kg/Hp |
| Weight-to-torque ratio | 5.5 kg/Nm |
| Power | 163 Hp @ 4200 rpm |
| Torque | 370 Nm @ 1600-2800 rpm (272.9 lb.-ft. @ 1600-2800 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 612.963 |
| Engine displacement | 2685 cm3 (163.85 cu. in.) |
| Number of cylinders | 5 |
| Engine configuration | Inline |
| Cylinder Bore | 88 mm (3.46 in.) |
| Piston Stroke | 88.3 mm (3.48 in.) |
| Compression ratio | 18:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Valvetrain | DOHC |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant capacity | 11 l (11.62 US qt | 9.68 UK qt) |
| Kerb Weight | 2040 kg (4497.43 lbs.) |
| Max. weight | 2750 kg (6062.71 lbs.) |
| Max load | 710 kg (1565.28 lbs.) |
| Trunk (boot) space – minimum | 633 l (22.35 cu. ft.) |
| Trunk (boot) space – maximum | 2020 l (71.34 cu. ft.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Max. roof load | 100 kg (220.46 lbs.) |
| Permitted trailer load (braked) | 3365 kg (7418.56 lbs.) |
| Permitted trailer load (unbraked) | 750 kg (1653.47 lbs.) |
| Length | 4587 mm (180.59 in.) |
| Width | 1833 mm (72.17 in.) |
| Width including mirrors | 2190 mm (86.22 in.) |
| Height | 1820 mm (71.65 in.) |
| Wheelbase | 2820 mm (111.02 in.) |
| Front track | 1565 mm (61.61 in.) |
| Rear track | 1565 mm (61.61 in.) |
| Front overhang | 840 mm (33.07 in.) |
| Rear overhang | 927 mm (36.5 in.) |
| Ride height (ground clearance) | 204 mm (8.03 in.) |
| Drag coefficient (Cd) | 0.39 |
| Minimum turning circle | 11.9 m (39.04 ft.) |
| Approach angle | 29.5° |
| Departure angle | 31° |
| Climb angle | 45° |
| Wading depth | 500 mm (19.69 in.) |
| Drivetrain | All wheel drive (4×4) |
| Number of gears | 6 |
| Gearbox type | Automatic |
| Front suspension | Coil spring, Double wishbone, Transverse stabilizer |
| Rear suspension | Double wishbone, Transverse stabilizer, Coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Steering rack and pinion |
| Power steering | Hydraulic |
| Tires size | 225/75 R16 |
| Wheel rims size | 6.5J x 16 |
Powertrain & Engine Architecture
The ML 270 CDI 4MATIC was powered by the OM 612.963, a 2.7-liter inline five-cylinder diesel engine. This engine was a significant development for Mercedes-Benz, representing their move towards more refined and powerful diesel offerings. It featured a common rail direct injection system, delivering fuel at extremely high pressure for improved combustion efficiency and reduced emissions. A turbocharger with an intercooler further enhanced performance, boosting power and torque. The engine produced 163 horsepower at 4200 rpm and a substantial 370 Nm (272.9 lb-ft) of torque between 1600 and 2800 rpm. This torque output was a key characteristic, providing strong pulling power and effortless acceleration, particularly useful for towing and off-road driving. The engine utilized a double overhead camshaft (DOHC) valvetrain with four valves per cylinder, optimizing gas flow and contributing to its overall efficiency. The automatic transmission was a five-speed unit, designed to work seamlessly with the engine’s torque curve.
Driving Characteristics
The ML 270 CDI 4MATIC offered a distinctly different driving experience compared to the higher-output gasoline versions of the W163. While not as overtly quick, the diesel engine’s abundant torque provided strong acceleration from low speeds and excellent mid-range responsiveness. The automatic transmission, while smooth, wasn’t particularly sporty, prioritizing comfort and ease of use over rapid gear changes. The 4MATIC all-wheel-drive system provided excellent traction in various conditions, making it a capable performer on slippery surfaces. Compared to the manual transmission versions, the automatic offered a more relaxed driving experience, particularly in urban traffic. However, the automatic did slightly diminish overall fuel economy and responsiveness. The weight of the vehicle, around 2040 kg (4497.43 lbs), was noticeable, but the engine’s torque helped to mitigate this.
Equipment & Trim Levels
The ML 270 CDI 4MATIC typically came equipped with a respectable level of standard features. These included air conditioning, power windows and locks, a basic audio system, and cloth upholstery. Safety features such as ABS brakes and a driver’s airbag were also standard. Optional extras included leather upholstery, sunroof, upgraded audio systems, and parking sensors. The trim level was generally positioned as mid-range within the W163 lineup, offering a good balance of features and affordability. It wasn’t as lavishly equipped as the ML 430, but offered more comfort and convenience than the base models.
Chassis & Braking
The W163 M-Class featured an independent suspension system all around, utilizing coil springs, double wishbones, and a transverse stabilizer bar on both the front and rear axles. This setup provided a comfortable ride and good handling characteristics. The ML 270 CDI 4MATIC was equipped with ventilated disc brakes on the front wheels and solid disc brakes on the rear. The ABS anti-lock braking system was standard, enhancing braking performance and stability. The suspension was tuned to prioritize comfort and stability, rather than outright sportiness, reflecting the vehicle’s intended role as a luxury SUV.
Market Reception & Comparison
The ML 270 CDI 4MATIC was generally well-received by automotive critics, particularly in Europe. It was praised for its fuel efficiency, strong torque output, and all-weather capability. However, some critics noted that the automatic transmission could feel sluggish at times, and the overall driving experience wasn’t as engaging as some of its competitors. Compared to the ML 320, the 270 CDI offered significantly better fuel economy but less overall power. The ML 430 provided a more luxurious and powerful experience, but at a higher price point. The 270 CDI represented a sweet spot for buyers seeking a practical and economical luxury SUV.
Legacy
The OM 612 engine family, including the 2.7-liter variant found in the ML 270 CDI, proved to be relatively reliable, although preventative maintenance is crucial. Common issues include injector failures and potential problems with the turbocharger. Today, the W163 ML 270 CDI 4MATIC can be found on the used car market at relatively affordable prices. It remains a viable option for buyers seeking a capable and comfortable SUV, but potential buyers should be aware of the age-related maintenance requirements and potential issues associated with older diesel engines. The ML 270 CDI 4MATIC played a significant role in establishing Mercedes-Benz as a major player in the luxury SUV segment, paving the way for future generations of M-Class vehicles.
