Mercedes-Benz W124 (facelift ) 250 D Turbo (126 Hp) Automatic

The Mercedes-Benz W124 represents a pivotal era for the German automaker, bridging the gap between the earlier, more utilitarian W115 and the technologically advanced W202. Produced from 1985 to 1996, the W124 was designed with a focus on durability, safety, and a more refined driving experience. The facelifted models, introduced in 1989, brought subtle but significant improvements to the exterior styling and interior appointments. Among the various engine options available, the 250 D Turbo, equipped with a 2.5-liter five-cylinder diesel engine and a turbocharger, offered a compelling blend of performance and fuel efficiency, particularly appealing to European markets where diesel engines were favored. This model, producing 126 horsepower, became a popular choice for those seeking a comfortable and reliable mid-size sedan.

Mercedes-Benz W124 250 D Turbo (1989-1993)

The W124 250 D Turbo, produced between September 1989 and July 1993, was a key variant within the W124 range. While not officially sold in the United States due to emissions regulations and differing market preferences, the W124 series as a whole gained a strong following among enthusiasts for its build quality and engineering. The 250 D Turbo specifically addressed the demand for a diesel-powered vehicle with enhanced performance, thanks to the addition of a turbocharger to the proven 2.5-liter inline-five engine. This model offered a significant upgrade over the naturally aspirated diesel options, providing improved acceleration and cruising ability without sacrificing the inherent fuel economy of a diesel powerplant.

Engine & Performance

The heart of the W124 250 D Turbo is its OM 602 D 25 A / 602.962 2.5-liter inline-five cylinder diesel engine. This engine, displacing 2497 cm³ (152.38 cu. in.), benefits from a turbocharger and precombustion chamber fuel injection, allowing it to produce 126 horsepower at 4600 rpm and 231 Nm (170.38 lb.-ft.) of torque at 2800 rpm. The turbocharger significantly enhances the engine’s responsiveness and power delivery. Power per liter is rated at 50.5 Hp/l. The engine is longitudinally mounted at the front of the vehicle. Power is delivered to the rear wheels via a four-speed automatic transmission. Acceleration from 0 to 100 km/h (0-62 mph) takes 12.3 seconds, while 0 to 60 mph is achieved in approximately 11.7 seconds. The vehicle boasts a maximum speed of 198 km/h (123.03 mph). The weight-to-power ratio is 11.4 kg/Hp, and the weight-to-torque ratio is 6.2 kg/Nm.

Design & Features

The W124 250 D Turbo is a four-door sedan with a classic, understated Mercedes-Benz design. The 1989 facelift brought subtle refinements to the exterior, including a revised front grille, updated headlights, and smoother body lines. The interior is characterized by its high-quality materials, comfortable seating for five occupants, and a focus on practicality. Safety features, for the time, were comprehensive, including an Anti-lock Braking System (ABS). The vehicle’s suspension utilizes a wishbone setup at the front and an independent multi-link suspension at the rear, providing a comfortable and controlled ride. Ventilated disc brakes are fitted to the front wheels, while disc brakes are used at the rear. Hydraulic power steering ensures ease of maneuverability. The standard tire size is 195/65 R15, mounted on 6.5J x 15 inch wheel rims.

Technical Specifications

BrandMercedes-Benz
ModelW124
GenerationW124 (facelift 1989)
Type (Engine)250 D Turbo (126 Hp) Automatic
Start of productionSeptember, 1989
End of productionJuly, 1993
Powertrain ArchitectureInternal Combustion engine
Body typeSedan
Seats5
Doors4
Fuel consumption (urban)9.2 l/100 km (25.6 US mpg, 30.7 UK mpg, 10.9 km/l)
Fuel consumption (extra urban)6 l/100 km (39.2 US mpg, 47.1 UK mpg, 16.7 km/l)
Fuel consumption (combined)7.9 l/100 km (29.8 US mpg, 35.8 UK mpg, 12.7 km/l)
Fuel TypeDiesel
Acceleration 0 – 100 km/h12.3 sec
Acceleration 0 – 62 mph12.3 sec
Acceleration 0 – 60 mph11.7 sec
Maximum speed198 km/h (123.03 mph)
Weight-to-power ratio11.4 kg/Hp
Weight-to-torque ratio6.2 kg/Nm
Power126 Hp @ 4600 rpm
Power per litre50.5 Hp/l
Torque231 Nm @ 2800 rpm (170.38 lb.-ft. @ 2800 rpm)
Engine layoutFront, Longitudinal
Engine Model/CodeOM 602 D 25 A / 602.962
Engine displacement2497 cm³ (152.38 cu. in.)
Number of cylinders5
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 aspirationTurbocharger
ValvetrainSOHC
Engine oil capacity7 l (7.4 US qt | 6.16 UK qt)
Coolant9.5 l (10.04 US qt | 8.36 UK qt)
Kerb Weight1440 kg (3174.66 lbs.)
Max. weight1960 kg (4321.06 lbs.)
Max load520 kg (1146.4 lbs.)
Fuel tank capacity70 l (18.49 US gal | 15.4 UK gal)
Length4740 mm (186.61 in.)
Width1740 mm (68.5 in.)
Height1428 mm (56.22 in.)
Wheelbase2800 mm (110.24 in.)
Front track1501 mm (59.09 in.)
Rear track1491 mm (58.7 in.)
Minimum turning circle11 m (36.09 ft.)
Drivetrain ArchitectureRear wheel drive
Number of gears4
Gearbox typeAutomatic transmission
Front suspensionWishbone
Rear suspensionIndependent multi-link suspension
Front brakesVentilated discs
Rear brakesDisc
Assisting systemsABS (Anti-lock braking system)
Steering typeCone worm with recirculation balls
Power steeringHydraulic Steering

The Mercedes-Benz W124 250 D Turbo remains a highly regarded vehicle, celebrated for its robust construction, comfortable ride, and fuel-efficient diesel engine. While never officially available in the US market, its enduring appeal speaks to the quality and engineering prowess of Mercedes-Benz during this era.

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