1978-1980 Mercedes-Benz S123 230 T (109 Hp)

The Mercedes-Benz S123 230 T, produced between February 1978 and April 1980, represents a significant iteration within the W123 series, specifically the T-Modell (estate/station wagon) body style. This variant occupied a middle ground in the 123 lineup, offering a balance between practicality, comfort, and performance. It was positioned above the base 200 T models and below the more powerful 280 TE variants. The S123 chassis, known for its robust construction and engineering, provided a platform for a versatile vehicle aimed at families and those requiring substantial cargo space without sacrificing the Mercedes-Benz reputation for quality and refinement. The 230 T was part of the first generation of officially produced Mercedes-Benz wagons, moving away from coachbuilt conversions.

Powertrain & Engine Architecture

The heart of the 230 T is the M115 V 23 / 115.954 engine, a 2.3-liter inline-four cylinder gasoline engine. This engine produced 109 horsepower at 4800 rpm and 186 Nm (137.19 lb-ft) of torque at 3000 rpm. The engine featured a single overhead camshaft (SOHC) valvetrain with two valves per cylinder. Crucially, the 230 T utilized a carburetor fuel injection system – specifically, a Solex 35/40 PHH carburetor – which was a common feature for Mercedes-Benz engines of this era. This contrasts with the later fuel-injected models in the W123 range. The engine’s bore and stroke measured 93.75 mm (3.69 in) and 83.6 mm (3.29 in) respectively, resulting in a compression ratio of 9:1. The engine oil capacity was 6 liters (6.34 US qt / 5.28 UK qt), and it required coolant totaling 10 liters (10.57 US qt / 8.8 UK qt). The engine was mounted longitudinally in the front of the vehicle.

The 230 T was primarily offered with a 4-speed manual transmission, although an optional 4-speed automatic transmission was available. The automatic transmission was a hydraulic unit, providing smooth, if not particularly sporty, gear changes. The automatic transmission was a popular choice for buyers prioritizing comfort and ease of driving, especially given the vehicle’s intended use as a family wagon.

Driving Characteristics

The 230 T, with its 109 hp and either the manual or automatic transmission, offered a driving experience geared towards comfortable cruising rather than outright performance. Acceleration from 0 to 100 km/h (0-62 mph) took approximately 14.4 seconds, while 0-60 mph was achieved in around 13.7 seconds. Top speed was limited to 170 km/h (105.63 mph). The carburetor-equipped engine delivered a relatively flat torque curve, providing adequate power for everyday driving and moderate loads. However, compared to the 280 TE with its larger engine and fuel injection, the 230 T felt noticeably less responsive, particularly when accelerating or overtaking. The automatic transmission, while convenient, further diminished the sense of urgency. The weight-to-power ratio of 13.5 kg/Hp and weight-to-torque ratio of 7.9 kg/Nm reflected the vehicle’s moderate performance capabilities.

Equipment & Trim Levels

The 230 T came standard with features expected of a Mercedes-Benz of the period, including comfortable seating for five passengers, a spacious cargo area, and a well-appointed interior. Standard upholstery was typically a durable cloth material, although leather was available as an optional extra. The dashboard featured a classic Mercedes-Benz design with analog gauges and wood trim. Power steering was standard, enhancing maneuverability. Optional extras included a sunroof, air conditioning, upgraded audio systems, and a self-leveling rear suspension, which was particularly useful when carrying heavy loads. The trim level was generally consistent across the 230 T models, with options primarily focused on comfort and convenience features rather than significant aesthetic changes.

Chassis & Braking

The S123 chassis featured a robust construction with independent suspension at the front utilizing a double wishbone setup. The rear suspension employed a trailing arm design. This suspension configuration provided a comfortable ride and good handling characteristics, although it wasn’t particularly sporty. Braking was accomplished via disc brakes on all four wheels, offering adequate stopping power for the vehicle’s weight and performance. The steering system was a cone worm with recirculation balls, providing a relatively direct steering feel. Standard tire size was 195/70 R14, mounted on 6J x 14 inch wheel rims. The curb weight of the 230 T was 1470 kg (3240.8 lbs), with a maximum permissible weight of 2030 kg (4475.38 lbs), allowing for a substantial payload of 560 kg (1234.59 lbs).

Market Reception & Comparison

The Mercedes-Benz S123 230 T was generally well-received by critics and buyers alike. It was praised for its practicality, build quality, and comfortable ride. However, the carburetor-equipped engine and relatively modest power output were points of criticism, particularly when compared to the more powerful and technologically advanced 280 TE. Fuel consumption was also a concern, with figures of 14.7 l/100 km (16 US mpg / 19.2 UK mpg) in urban driving and 9.4 l/100 km (25 US mpg / 30.1 UK mpg) on the open road. Compared to the 200 T, the 230 T offered a noticeable performance improvement, justifying its higher price point. The 230 T appealed to buyers who wanted a versatile and reliable wagon without the expense of the top-of-the-line 280 TE.

Technical Specifications

Legacy

The Mercedes-Benz S123 230 T, while not the most powerful or technologically advanced variant of the W123 series, remains a highly regarded classic. The M115 engine, though carburetor-equipped, is known for its durability and relative simplicity, making it easier to maintain than later fuel-injected engines. The S123 chassis itself is renowned for its rust resistance (though still susceptible in certain climates) and overall build quality. Today, the 230 T commands a respectable price in the used car market, particularly examples in good condition. It appeals to enthusiasts who appreciate the classic Mercedes-Benz aesthetic and the practicality of a station wagon. While finding parts for the carburetor system can sometimes be challenging, the overall availability of spare parts for the W123 series remains relatively good, ensuring that these vehicles can be kept on the road for years to come. The 230 T represents a sweet spot in the W123 range, offering a blend of affordability, reliability, and classic Mercedes-Benz charm.