Mercedes-Benz S124 (facelift ) 300 TD Turbo (147 Hp) Automatic

The Mercedes-Benz S124 (facelift 1989) 300 TD Turbo: A Pillar of Engineering Excellence

The Mercedes-Benz W124 series, produced from 1984 to 1996, represents a pinnacle of German automotive engineering, renowned for its exceptional build quality, durability, and timeless design. Among its various body styles, the S124 station wagon (or “estate” in European parlance) stood out as a highly practical and luxurious offering. The Mercedes-Benz S124 (facelift 1989) 300 TD Turbo, specifically, emerged during a significant refresh of the W124 lineup, combining the robust S124 chassis with a potent turbocharged diesel engine, cementing its reputation as a sophisticated and long-lasting workhorse. Produced from September 1989 to July 1993, this model catered to discerning buyers who sought the practicality of a wagon without compromising on Mercedes-Benz’s hallmark comfort, safety, and performance, particularly in markets where diesel power was highly valued for its efficiency and torque.

This particular iteration of the S124 was not just another variant; it was a statement of intent from Mercedes-Benz, showcasing their commitment to diesel technology even in their premium offerings. The 1989 facelift brought subtle yet impactful aesthetic and technical enhancements, aligning the S124 with the evolving design language of the era while retaining its fundamental “over-engineered” ethos. The 300 TD Turbo model, with its advanced inline-six diesel powerplant, provided a compelling blend of power, fuel economy, and the legendary reliability that Mercedes-Benz was famous for, making it a highly desirable vehicle for long-distance cruising and family duties across Europe and beyond.

Evolution of the W124 Chassis and the 1989 Facelift

The W124 platform itself was a marvel of engineering when it debuted in 1984, replacing the beloved W123. It introduced numerous innovations in safety, aerodynamics, and suspension design. The S124 wagon variant, launched shortly after the sedan, quickly became a benchmark for luxury station wagons, offering cavernous cargo space and an optional third row of rear-facing seats. The 1989 facelift, often referred to as the “MOPF” (Modellpflege, or model refinement), brought several key updates that refreshed the W124’s appearance and improved its features.

Externally, the most noticeable changes included updated side cladding (often called “Sacco planks” after designer Bruno Sacco), which integrated more smoothly with the bumpers and bodywork, giving the car a more modern and cohesive look. The front grille was subtly revised, and the turn signal lenses became clear rather than amber, a popular styling trend of the late 1980s. Inside, minor refinements were made to materials and switchgear. More significantly, the facelift often coincided with powertrain updates, including the introduction of more refined and powerful engines, such as the turbocharged diesel found in the 300 TD Turbo. These updates ensured the W124 remained competitive and desirable in the luxury segment as it approached the turn of the decade.

Powertrain: The OM 603 D 30 A Diesel Engine

At the heart of the Mercedes-Benz S124 (facelift 1989) 300 TD Turbo was the formidable OM 603 D 30 A / 603.960 engine. This 3.0-liter (2996 cm³ or 182.83 cubic inches) inline-six diesel engine was a testament to Mercedes-Benz’s commitment to robust and efficient diesel power. Featuring a single overhead camshaft (SOHC) and two valves per cylinder, this engine utilized a precombustion chamber injection system, a common technology of the era that contributed to smoother, quieter operation and reduced emissions compared to direct injection systems of the time.

What truly set the 300 TD Turbo apart was its forced induction system. The turbocharger significantly boosted performance, delivering a healthy 147 horsepower at 4600 rpm. More importantly for a diesel, it produced a substantial 174.8 lb.-ft. of torque at a low 2400 rpm. This high torque output made the S124 300 TD Turbo remarkably tractable and effortless to drive, especially when laden with passengers and cargo. Power was sent to the rear wheels via a durable and smooth 4-speed automatic transmission, a common choice for luxury vehicles of this period, prioritizing comfort and longevity.

Performance figures were impressive for a large, luxury diesel wagon of its time: the 300 TD Turbo could accelerate from 0 to 60 mph in a respectable 10.4 seconds and reach a top speed of 121 mph. Beyond raw speed, the engine’s design emphasized longevity and fuel efficiency. With an urban fuel consumption rating of 25 US mpg and an extra-urban rating of 34.1 US mpg, the 300 TD Turbo offered excellent economy for its class, making it an ideal vehicle for long-distance travel. The engine’s substantial 7.5-liter (7.93 US quarts) oil capacity further contributed to its legendary durability and extended service intervals.

Design Philosophy and Interior Comfort

The S124’s design epitomizes Mercedes-Benz’s philosophy of functional elegance. The station wagon body offered unparalleled practicality, featuring a large, accessible cargo area, often expandable by folding the rear seats flat. Its five-door, five-seat configuration (with optional third-row seating in some markets) made it a versatile family vehicle. Measuring 187.6 inches in length, 68.5 inches in width, and 58.62 inches in height, with a generous 110.24-inch wheelbase, the S124 provided ample interior space and a commanding road presence.

Inside, the W124 cabin was a masterclass in ergonomic design and material quality. High-grade fabrics, leathers, and wood trim adorned the interior, creating a luxurious and inviting atmosphere. Controls were intuitively placed, and visibility was excellent. Mercedes-Benz prioritized long-distance comfort, with supportive seats and a quiet cabin, further enhanced by the smooth operation of the inline-six diesel.

Underneath, the S124 boasted sophisticated chassis engineering. It featured an independent multi-link rear suspension, a groundbreaking design that offered superior ride comfort and handling stability, even when fully loaded. The front suspension utilized a wishbone setup, contributing to precise steering and a refined ride. Stopping power was provided by ventilated disc brakes at the front and solid discs at the rear, complemented by an Anti-lock Braking System (ABS), a significant safety feature for its era. The hydraulic power steering, a recirculating ball type, provided a reassuringly solid feel and excellent feedback, reinforcing the car’s reputation for robust engineering.

Technical Specifications of the Mercedes-Benz S124 (facelift 1989) 300 TD Turbo

Legacy and Enduring Appeal

The Mercedes-Benz W124, and particularly the S124 wagon, is widely regarded as one of the most robust and well-built automobiles ever produced. The Mercedes-Benz S124 (facelift 1989) 300 TD Turbo embodies this reputation for “over-engineering,” which translates into exceptional longevity and reliability. It was designed to withstand years of rigorous use, and many examples remain on the road today, a testament to their inherent quality.

In its primary European market, the 300 TD Turbo competed with other premium wagons like the BMW 5-Series Touring (E34), the Audi 100 Avant, and the Volvo 700/900 series wagons. While competitors offered their own strengths, the S124 consistently stood out for its blend of luxurious comfort, unparalleled build quality, advanced (for its time) multi-link suspension, and the formidable durability of its diesel powertrains. It was often seen as the choice for those who valued understated quality, long-term ownership, and practical luxury.

The historical significance of the S124 lies in its role as a benchmark. It set new standards for safety, material quality, and driving dynamics in the executive car segment. Its influence can be seen in subsequent Mercedes-Benz models, which continued to refine the W124’s core principles. Today, the S124, especially the robust diesel wagons, has achieved cult status among enthusiasts and collectors. They are highly sought after for their classic Mercedes-Benz aesthetic, their comfortable and composed ride, and their legendary mechanical resilience. These vehicles represent an era when engineering integrity and durability were paramount, making the Mercedes-Benz S124 (facelift 1989) 300 TD Turbo more than just a car; it’s a piece of automotive history that continues to impress with its enduring quality and timeless appeal.