Mercedes-Benz W123 280 E (185 Hp)

The Mercedes-Benz W123, produced from April 1978 to December 1985, represents a pivotal generation in the lineage of the Mercedes-Benz E-Class. Positioned as a mid-size executive car, the W123 succeeded the W114 and W115 models, and was itself superseded by the W201. Known for its robust engineering, build quality, and understated elegance, the W123 established a new benchmark for safety and refinement in its class. The 280 E variant, equipped with a 2.8-liter inline-six engine, was a popular choice for those seeking a balance of performance and fuel efficiency. The W123 was not initially sold in the United States, but later models were imported to meet growing demand for European luxury vehicles.

The Mercedes-Benz W123 280 E

The W123 280 E stands out within the W123 range due to its larger displacement engine and corresponding performance capabilities. It was designed to appeal to drivers who desired a more spirited driving experience without sacrificing the comfort and practicality expected of a Mercedes-Benz. The 280 E’s engine, a refined evolution of Mercedes-Benz’s long-standing inline-six tradition, delivered smooth power and respectable fuel economy for its time. The model’s success contributed significantly to the W123’s overall reputation as a durable and reliable vehicle, cementing its place as a classic among Mercedes-Benz enthusiasts.

Engine & Performance

The heart of the W123 280 E is the M 110 E 28 engine, a 2.8-liter (2746 cm³ or 167.57 cu. in.) naturally aspirated inline-six cylinder gasoline engine. This engine produces 185 horsepower at 5800 rpm and 240 Newton-meters (177.01 lb.-ft.) of torque at 4500 rpm. The engine features multi-port manifold fuel injection and a double overhead camshaft (DOHC) valvetrain with two valves per cylinder. The compression ratio is 9:1. This configuration results in a power-to-liter ratio of 67.4 hp/l.

Performance figures for the 280 E are as follows: acceleration from 0 to 100 km/h (0-62 mph) takes 9.9 seconds, while 0 to 60 mph is achieved in approximately 9.4 seconds. The vehicle has a maximum speed of 200 km/h (124.27 mph). The weight-to-power ratio is 8 kg/hp, and the weight-to-torque ratio is 6.1 kg/Nm. The engine is longitudinally mounted at the front of the vehicle, driving the rear wheels.

Design & Features

The W123 280 E is a four-door sedan with a classic three-box design. Its exterior styling is characterized by clean lines, a relatively upright grille, and prominent headlights. The body is constructed with a focus on safety, incorporating crumple zones and a robust passenger cell. The interior is spacious and well-appointed, offering seating for five passengers.

Key features of the W123 280 E include hydraulic power steering, disc brakes on all four wheels, and a four-speed manual transmission (automatic transmissions were also available). The suspension system utilizes a double wishbone setup at the front and a trailing arm configuration at the rear, providing a comfortable ride and stable handling. The vehicle’s dimensions are: length 4725 mm (186.02 in), width 1786 mm (70.31 in), height 1438 mm (56.61 in), and wheelbase 2795 mm (110.04 in). The fuel tank capacity is 80 liters (21.13 US gal | 17.6 UK gal). The tires are sized 195/70 R14 on 6J x 14 inch wheel rims.

Technical Specifications