1978-1986 Mercedes-Benz S123 280 TE (185 Hp) Automatic

The Mercedes-Benz S123 280 TE, produced between April 1978 and January 1986, represents a significant iteration within the W123 series, specifically the T-Modell (estate/station wagon) variant. Positioned as a premium offering within the W123 lineup, the 280 TE combined the practicality of a wagon with the performance of a larger engine, appealing to buyers seeking both utility and a refined driving experience. It was built on the 123 platform, known for its robust engineering and longevity. The “TE” designation signified the *Touring Estate* body style, differentiating it from the sedan (S123) and coupe (C123) versions.

Powertrain & Engine Architecture

The heart of the 280 TE is the M 110 E 28 engine, a 2.8-liter inline-six cylinder gasoline engine. This engine, bearing the code 110.984, is a naturally aspirated, single overhead camshaft (SOHC) design. It produces 185 horsepower at 5800 rpm and 240 Nm (177.01 lb-ft) of torque at 4500 rpm. The engine features multi-port manifold fuel injection, a relatively advanced system for its time, contributing to improved fuel efficiency and smoother operation compared to carbureted engines. Bore and stroke dimensions are 86 mm (3.39 in) and 78.8 mm (3.1 in) respectively, resulting in a displacement of 2746 cm³ (167.57 cu. in). The compression ratio is 9:1. The engine’s longitudinal front-engine layout was typical for Mercedes-Benz at the time, contributing to balanced weight distribution.

Paired with the M 110 E 28 engine is a 4-speed automatic transmission. This transmission, while not known for its sportiness, was valued for its smoothness and ease of use, aligning with the 280 TE’s positioning as a comfortable and luxurious vehicle. The automatic transmission was a key factor in attracting buyers who preferred convenience over manual gear changes. Specific gear ratios varied slightly depending on the final drive ratio fitted to the vehicle, but generally prioritized comfortable cruising over rapid acceleration.

Engine Oil & Cooling

The M 110 E 28 engine requires 7.5 liters (7.93 US qt | 6.6 UK qt) of engine oil, with a specific oil specification recommended by Mercedes-Benz. The cooling system holds 10 liters (10.57 US qt | 8.8 UK qt) of coolant, essential for maintaining optimal engine temperature during operation.

Driving Characteristics

The 280 TE, with its 185 hp and automatic transmission, offered a comfortable and refined driving experience. Acceleration from 0 to 100 km/h (0-62 mph) took approximately 11.2 seconds, and 0 to 60 mph was achieved in around 10.6 seconds. While not a sports car, the engine provided sufficient power for highway cruising and overtaking maneuvers. The automatic transmission, while smooth, did result in some power loss compared to the available 5-speed manual transmission offered on other W123 models. The weight of the vehicle (1560 kg / 3439.21 lbs) also impacted acceleration. Compared to the smaller 230 TE, the 280 TE offered noticeably more power and torque, making it a more capable vehicle for carrying passengers and cargo. Compared to the 300TD turbodiesel, the 280 TE provided quicker acceleration but significantly lower fuel economy.

Equipment & Trim Levels

The 280 TE was generally well-equipped, reflecting its position as a premium model. Standard features typically included power steering, disc brakes on all four wheels, and comfortable seating for five passengers. Interior upholstery was typically cloth, but leather was available as an optional extra. Dashboard configuration was consistent across the W123 range, featuring a classic Mercedes-Benz design with wood trim. Optional extras included a sunroof, air conditioning, and upgraded audio systems. The level of trim could vary depending on the market, with some regions offering more standard features than others. The wagon configuration itself offered a significant amount of cargo space, making it ideal for families and those needing to transport larger items.

Chassis & Braking

The S123 280 TE utilized a double wishbone suspension at the front and a trailing arm suspension at the rear. This suspension setup provided a comfortable ride and good handling characteristics. All four wheels were equipped with disc brakes, providing ample stopping power. The steering system was a cone worm with recirculation balls, offering precise steering feel. Tire size was typically 195/70 R14 for both front and rear wheels, mounted on 6J x 14 inch wheel rims. The chassis was designed to handle the increased weight of the wagon body style and the larger engine, providing a stable and secure driving experience.

Market Reception & Comparison

The 280 TE was generally well-received by automotive critics, who praised its comfortable ride, spacious interior, and refined engine. However, some critics noted that the automatic transmission could feel sluggish at times, and the fuel economy was relatively poor compared to other W123 models, particularly the diesel variants. Fuel consumption was rated at 17.1 l/100 km (13.8 US mpg / 16.5 UK mpg) in urban conditions and 10.9 l/100 km (21.6 US mpg / 25.9 UK mpg) in extra-urban conditions. Compared to the 230 TE, the 280 TE offered a significant performance upgrade, but at a higher price point. Compared to the 300TD, the 280 TE offered quicker acceleration but significantly lower fuel economy. The 280 TE appealed to buyers who prioritized performance and refinement over fuel efficiency.

Technical Specifications

Legacy

The M 110 engine, found in the 280 TE, is known for its durability and reliability. When properly maintained, these engines can last for hundreds of thousands of miles. The W123 series as a whole has earned a reputation for exceptional build quality and longevity. Today, the 280 TE is a sought-after classic car, particularly among Mercedes-Benz enthusiasts. Values have been steadily increasing in recent years, reflecting the car’s rarity and desirability. While maintenance can be more expensive than for modern vehicles, the 280 TE offers a unique driving experience and a connection to a bygone era of automotive engineering. Finding well-maintained examples can be challenging, as many have suffered from neglect or improper repairs. However, a well-preserved 280 TE represents a rewarding ownership experience for those willing to invest the time and effort.