Mercedes-Benz W124 300 D 4MATIC (109 Hp)

The Mercedes-Benz W124 300 D 4MATIC, produced from December 1985 to August 1989, represents a significant evolution in the mid-size luxury sedan segment. As part of the W124 series, it offered a blend of robust engineering, sophisticated technology for its time, and a commitment to passenger safety. While not initially a major seller in the United States (the W124 series was sold in the US from 1986-1993, but the 300 D 4MATIC was not officially imported), the 300 D 4MATIC was a popular and highly regarded model in European markets, particularly for those seeking a durable, all-wheel-drive vehicle capable of handling challenging weather conditions. It established a reputation for longevity and build quality that continues to define the Mercedes-Benz brand today.

Mercedes-Benz W124 300 D 4MATIC: A Detailed Overview

The W124 series, launched in 1985, was intended as a successor to the W201 (190E) and W123 models. It aimed to bridge the gap between these two lines, offering a more spacious and refined experience than the 190E while maintaining the renowned durability of the W123. The 300 D 4MATIC variant specifically added all-wheel drive capability, enhancing traction and stability, making it a practical choice for drivers in regions with inclement weather. The “D” designation signifies a diesel engine, a popular choice in Europe due to fuel efficiency and lower running costs.

Engine & Performance

The heart of the W124 300 D 4MATIC is its 3.0-liter inline-six cylinder diesel engine, designated OM 603 D 30 / 603.913. This naturally aspirated engine produces 109 horsepower at 5000 rpm and 210 Nm (154.89 lb.-ft.) of torque at 2200 rpm. While the horsepower figure may seem modest by modern standards, the engine’s strength lies in its robust torque delivery, providing ample pulling power for comfortable cruising and effortless acceleration. The engine utilizes precombustion chamber injection, a technology common in Mercedes-Benz diesels of the era, contributing to efficient combustion and reduced emissions for the time. Power is delivered to all four wheels via a 5-speed manual transmission. Acceleration from 0 to 100 km/h (0-62 mph) takes approximately 15 seconds, and it achieves a maximum speed of 183 km/h (113.71 mph). The weight-to-power ratio is 14.3 kg/Hp, and the weight-to-torque ratio is 7.4 kg/Nm.

Design & Features

The W124 300 D 4MATIC is a four-door sedan with a classic, understated Mercedes-Benz design. Its body is characterized by clean lines, a relatively upright stance, and a focus on functional elegance. The interior is spacious and well-appointed, offering comfortable seating for five passengers. Key features included hydraulic power steering, ventilated front disc brakes, and disc brakes on the rear axle. A significant advancement for its time was the inclusion of ABS (Anti-lock Braking System) as standard equipment, enhancing safety by preventing wheel lockup during hard braking. The 4MATIC all-wheel-drive system employs a permanent rear-wheel drive configuration with an electrically or mechanically operated clutch to engage the front wheels when needed, providing optimal traction in slippery conditions. Trunk space is a generous 520 liters (18.36 cu. ft.).

Technical Specifications

BrandMercedes-Benz
ModelW124
GenerationW124
Type (Engine)300 D 4MATIC (109 Hp)
Start of productionDecember, 1985
End of productionAugust, 1989
Powertrain ArchitectureInternal Combustion engine
Body typeSedan
Seats5
Doors4
Fuel consumption (urban)10.6 l/100 km (22.2 US mpg, 26.6 UK mpg, 9.4 km/l)
Fuel consumption (extra urban)6.1 l/100 km (38.6 US mpg, 46.3 UK mpg, 16.4 km/l)
Fuel consumption (combined)7.4 l/100 km (31.8 US mpg, 38.2 UK mpg, 13.5 km/l)
Fuel TypeDiesel
Acceleration 0 – 100 km/h15 sec
Acceleration 0 – 62 mph15 sec
Acceleration 0 – 60 mph14.3 sec
Maximum speed183 km/h (113.71 mph)
Weight-to-power ratio14.3 kg/Hp
Weight-to-torque ratio7.4 kg/Nm
Power109 Hp @ 5000 rpm
Power per litre36.4 Hp/l
Torque210 Nm @ 2200 rpm (154.89 lb.-ft. @ 2200 rpm)
Engine layoutFront, Longitudinal
Engine Model/CodeOM 603 D 30 / 603.913
Engine displacement2996 cm3 (182.83 cu. in.)
Number of cylinders6
Engine configurationInline
Cylinder Bore87 mm (3.43 in.)
Piston Stroke84 mm (3.31 in.)
Compression ratio22:1
Number of valves per cylinder2
Fuel injection systemPrecombustion chamber injection
Engine aspirationNaturally aspirated engine
ValvetrainSOHC
Engine oil capacity7.5 l (7.93 US qt | 6.6 UK qt)
Coolant9.5 l (10.04 US qt | 8.36 UK qt)
Kerb Weight1560 kg (3439.21 lbs.)
Max. weight2050 kg (4519.48 lbs.)
Max load490 kg (1080.27 lbs.)
Trunk (boot) space – minimum520 l (18.36 cu. ft.)
Fuel tank capacity70 l (18.49 US gal | 15.4 UK gal)
Length4740 mm (186.61 in.)
Width1740 mm (68.5 in.)
Height1431 mm (56.34 in.)
Wheelbase2800 mm (110.24 in.)
Front track1501 mm (59.09 in.)
Rear (Back) track1491 mm (58.7 in.)
Drivetrain ArchitectureThe Internal combustion engine (ICE) drives the rear wheels permanently, and the front wheels are driven through an electrically or mechanically operated clutch if necessary.
Drive wheelAll wheel drive (4×4)
Number of gears and type of gearbox5 gears, manual transmission
Front suspensionWishbone
Rear suspensionIndependent multi-link suspension, Coil spring
Front brakesVentilated discs
Rear brakesDisc
Assisting systemsABS (Anti-lock braking system)
Steering typeCone worm with recirculation balls
Power steeringHydraulic Steering
Tires sizeFront wheel tires: 195/65 R15Rear wheel tires: 195/65 R15
Wheel rims sizeFront wheel rims: 6.5J x 15Rear wheel rims: 6.5J x 15

The Mercedes-Benz W124 300 D 4MATIC remains a sought-after vehicle among enthusiasts, prized for its durability, comfort, and all-weather capability. It represents a high point in Mercedes-Benz engineering and a testament to the brand’s commitment to building long-lasting, reliable automobiles.

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