1990-1993 Mercedes-Benz S124 (facelift ) 250 TD Turbo (126 Hp) Automatic

The Mercedes-Benz S124 (facelift 1989) 250 TD Turbo (126 Hp) Automatic, produced between March 1990 and July 1993, represents a high point in Mercedes-Benz engineering and practicality. This station wagon, known as the “estate” in European markets, is part of the highly regarded W124 series (124 chassis code), celebrated for its durability, comfort, and understated luxury. The S124 250 TD Turbo occupied a specific niche within the W124 lineup, positioned as a premium, fuel-efficient, and versatile option primarily aimed at European buyers who valued long-distance cruising capability and cargo space. While the W124 sedan and coupe were more prevalent in North America, this turbodiesel wagon catered to a market where diesel engines and wagons were more popular in the luxury segment.

Powertrain & Engine Architecture

The heart of the S124 250 TD Turbo is the OM 602 D 25 A engine, a 2.5-liter (2497 cc / 152.38 cubic inches) inline five-cylinder turbodiesel. This engine was designed with longevity and efficiency as primary goals. It features a single overhead camshaft (SOHC) valvetrain with two valves per cylinder and utilizes a precombustion chamber injection system. This system, common in diesel engines of the era, offered a smoother and quieter operation compared to direct injection, while still providing reliable combustion. The precombustion chambers help to initiate combustion more effectively, leading to reduced engine noise and improved cold-starting performance.

The addition of a turbocharger significantly enhanced the engine’s output, producing 126 horsepower at 4600 rpm and a robust 231 Nm (170.38 lb-ft) of torque at 2800 rpm. This torque delivery is particularly important for a wagon designed to carry passengers and cargo, providing ample pulling power at lower engine speeds. The engine is paired with a smooth-shifting 4-speed automatic transmission, a standard and well-regarded setup for Mercedes-Benz vehicles of the period. This transmission contributed to the car’s refined driving experience, offering seamless gear changes and durability. Performance figures include a 0-60 mph acceleration time of approximately 12.3 seconds and a top speed of 114.95 mph (185 km/h). While not a sports car, these figures were more than adequate for a family-oriented turbodiesel wagon of its time.

Fuel economy was a key advantage of the 250 TD Turbo. It achieved approximately 10.1 liters per 100 km (23.3 US mpg) in urban driving and an impressive 6.2 liters per 100 km (37.9 US mpg) on the highway, making it an economical choice for long-distance travel.

Driving Characteristics

The S124 250 TD Turbo Automatic offered a distinctly different driving experience compared to its gasoline-powered siblings or the manual transmission versions of the same engine. The automatic transmission prioritized smooth, effortless cruising over sporty acceleration. The 4-speed automatic’s gear ratios were optimized for fuel efficiency and comfortable highway driving, rather than quick acceleration. While the manual transmission versions of the 250 TD felt more responsive, the automatic provided a more relaxed and convenient driving experience, particularly in city traffic. Compared to the higher-output 300E or the sportier coupe models, the 250 TD Turbo was noticeably less powerful, but its abundant low-end torque made it feel surprisingly capable, even when fully loaded with passengers and luggage. The turbocharger provided a noticeable boost in power, but the engine’s overall character remained focused on smooth, linear power delivery rather than outright performance.

Equipment & Trim Levels

The S124 250 TD Turbo Automatic was generally well-equipped, reflecting its position as a premium vehicle. Standard features typically included power windows, central locking, a sunroof, and a high-quality audio system. Interior upholstery was typically a durable cloth or optional leather. The dashboard layout was functional and ergonomic, with clear instrumentation and logically placed controls. Optional extras included automatic climate control, heated seats, and upgraded audio systems. The S124 also offered a range of convenience features, such as a rear window wiper, power-adjustable mirrors, and a trip computer. The level of trim and options varied depending on the specific market and customer preferences.

Chassis & Braking

The S124 chassis was renowned for its robust construction and excellent ride quality. The suspension system featured independent suspension all around, with a multi-link rear suspension that provided a superior balance of comfort and handling. The rear suspension often included a self-leveling system to maintain ride height under varying loads. Braking was handled by disc brakes on all four wheels, with Anti-lock Braking System (ABS) as standard equipment, a significant safety feature for the time. The hydraulic power steering provided precise and reassuring feedback. The S124 250 TD Turbo typically rode on 195/65 R15 tires mounted on 6.5J x 15 inch wheels, a sensible setup prioritizing comfort and durability. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.

Market Reception & Comparison

The S124 250 TD Turbo Automatic was generally well-received by automotive critics, particularly in Europe. It was praised for its fuel efficiency, comfortable ride, and spacious interior. Critics noted that it wasn’t a particularly sporty vehicle, but its strengths lay in its practicality and long-distance cruising ability. Compared to the gasoline-powered W124 models, the 250 TD Turbo offered significantly better fuel economy and lower running costs, making it an attractive option for high-mileage drivers. Compared to the BMW 5-Series Touring and Audi 100 Avant, the S124 250 TD Turbo offered a more luxurious and comfortable ride, but perhaps lacked the sporty handling of the BMW or the all-wheel-drive capability of the Audi. Its reliability was also a key selling point, with the OM 602 engine being known for its durability.

Technical Specifications

Legacy

The Mercedes-Benz S124 250 TD Turbo Automatic has earned a well-deserved reputation for longevity and reliability. The OM 602 engine is known to be exceptionally durable, and many examples have surpassed 300,000 miles with proper maintenance. In the used car market today, well-maintained S124 250 TD Turbos are highly sought after by enthusiasts and collectors. Their classic design, comfortable ride, and fuel efficiency make them appealing alternatives to more modern vehicles. While maintenance can be more expensive than for newer cars, the S124’s robust construction and readily available parts supply ensure that it can be kept on the road for many years to come. It remains a testament to Mercedes-Benz’s commitment to engineering excellence and a lasting symbol of a bygone era of automotive quality.