1989-1993 Mercedes-Benz S124 (facelift ) 250 TD (94 Hp) Automatic

The Mercedes-Benz S124 (facelift 1989) 250 TD Automatic represents a compelling blend of German engineering, practicality, and understated luxury. Produced from 1989 through July 1993, this variant of the W124 series – the station wagon (estate) body style – was specifically tailored for the European market, where it quickly gained a reputation for durability, efficiency, and a comfortable driving experience. While W124 sedans and coupes saw limited diesel offerings in the United States, the S124, particularly with a diesel powertrain, embodied Mercedes-Benz’s core values for its European clientele: longevity, fuel economy, and a high-quality, reliable vehicle capable of covering significant distances. This model occupied a mid-range position within the W124 lineup, offering a balance between the more affordable 200D/230E models and the higher-performance 300E/320E variants.

Engineering and Design of the S124 (facelift 1989) 250 TD Automatic

The 1989 facelift of the W124 brought subtle but significant updates to the platform, enhancing both aesthetics and mechanical refinement. For the S124 station wagon, these changes included color-matched lower body cladding, replacing the earlier contrasting dark gray, creating a more cohesive and modern appearance. The fundamental design philosophy remained consistent with the original W124: a timeless, elegant, and functional form prioritizing safety and aerodynamic efficiency. The station wagon body, with its expansive cargo area and five-door configuration, provided exceptional utility, making it popular with families, professionals, and even as a luxurious taxi in its home market.

The S124’s design wasn’t merely aesthetic; it was fundamentally engineered for purpose. Robust construction and high-quality materials were evident throughout, from the solid feel of the doors to the durable interior fabrics. The vehicle’s dimensions – 187.6 inches in length, 68.5 inches in width, and a 110.24-inch wheelbase – provided a substantial road presence and a remarkably spacious cabin for its era. The generous wheelbase contributed to a stable and comfortable ride, a hallmark of Mercedes-Benz engineering. The S124’s body was designed with a drag coefficient of 0.32, contributing to improved fuel efficiency and reduced wind noise.

Powertrain & Engine Architecture

The heart of the S124 (facelift 1989) 250 TD Automatic is the OM 602 D 25, an inline five-cylinder diesel engine displacing 2.5 liters (152.38 cubic inches). This naturally aspirated, SOHC (Single Overhead Camshaft) powerplant was celebrated for its legendary durability and efficiency, rather than outright performance. It produced 94 horsepower at 4600 rpm and 158 Nm (116.53 lb-ft) of torque between 2600-3100 rpm. The engine utilized a precombustion chamber injection system, a common technology for diesels of the time, contributing to its robustness and tolerance for varying fuel qualities. A high compression ratio of 22:1 maximized efficiency from diesel fuel.

Power was delivered to the rear wheels via a smooth-shifting 4-speed automatic transmission (typically the 722.3 series), a common choice for Mercedes-Benz models prioritizing comfort and ease of driving. The transmission featured a torque converter for smooth engagement and a hydraulic control system for gear selection. The powertrain layout – front-longitudinal engine and rear-wheel drive – provided balanced weight distribution and characteristic Mercedes-Benz handling. The engine block was constructed from cast iron, contributing to its longevity, while the cylinder head was made from aluminum alloy to reduce weight.

Driving Characteristics

The 250 TD Automatic wasn’t designed for rapid acceleration. Its 0-60 mph time was a leisurely 17.9 seconds, with a top speed of approximately 99.42 mph (160 km/h). However, its strength lay in its impressive fuel economy and usable torque. The automatic transmission’s gear ratios were optimized for comfortable cruising and effortless load-carrying. First gear was relatively short for quick acceleration from a standstill, while higher gears were spaced to maximize fuel efficiency at highway speeds. Compared to the manual transmission versions of the 250 TD, the automatic offered a more relaxed driving experience, sacrificing some responsiveness for convenience. Compared to the higher-output 300 TD, the 250 TD provided a more economical option, albeit with less power and performance.

Equipment & Trim Levels

The S124 250 TD Automatic came standard with a comprehensive list of features, reflecting Mercedes-Benz’s commitment to comfort and safety. Standard equipment included power steering, central locking, electric windows, and an Anti-lock Braking System (ABS). Interior upholstery typically consisted of durable cloth or optional leather. The dashboard layout was logical and driver-focused, with clear instrumentation. Optional extras included a sunroof, air conditioning, heated seats, and a premium sound system. The S124 also offered a range of convenience features, such as a self-leveling rear suspension, which helped maintain a consistent ride height even when the vehicle was heavily loaded. The rear cargo area featured a retractable load cover and tie-down points for securing cargo.

Chassis & Braking

The S124 250 TD Automatic featured a robust chassis and braking system designed to handle the vehicle’s weight and provide confident stopping power. The front suspension utilized independent wishbones with coil springs and shock absorbers, while the rear suspension employed an independent multi-link setup, also with coil springs and shock absorbers. This configuration provided a comfortable ride and good handling characteristics. The braking system consisted of disc brakes on all four wheels, providing ample stopping power. The ABS system helped prevent wheel lockup during emergency braking, enhancing stability and control. The steering system was a cone worm with recirculation balls, providing precise and responsive steering feel. Stabilizer bars were fitted to both the front and rear axles to reduce body roll during cornering.

Market Reception & Comparison

Critics generally praised the S124 250 TD Automatic for its reliability, fuel economy, and comfortable ride. While its performance wasn’t particularly exciting, it was considered adequate for its intended purpose. Compared to the more powerful 300 TD, the 250 TD offered a more affordable entry point into the S124 wagon range. Its fuel economy – estimated at 25.3 US mpg in urban driving and 37.3 US mpg on the highway – was a significant advantage, particularly in Europe where fuel prices were higher. The 250 TD’s robust construction and durable engine made it a popular choice for high-mileage drivers. In comparison to competitors like the BMW 5 Series Touring and Audi 100 Avant, the S124 offered a more luxurious and comfortable experience, albeit with slightly less sporty handling.

Technical Specifications

Legacy

The Mercedes-Benz S124 250 TD Automatic has earned a well-deserved reputation for long-term reliability. The OM602 engine is known for its ability to exceed 300,000 miles with proper maintenance. In the used car market today, these wagons are highly sought after by enthusiasts and collectors. Well-maintained examples command premium prices, reflecting their enduring quality and historical significance. The 250 TD’s relatively simple mechanicals make it easier to maintain and repair compared to more complex modern vehicles. Its combination of practicality, comfort, and durability ensures that the S124 250 TD Automatic will remain a cherished classic for years to come.