The Mercedes-Benz W124, particularly the 300 E variant produced from 1989 to 1992, represents a pivotal point in the manufacturer’s mid-size sedan lineage. Positioned above the W201 (190E) and below the flagship S-Class (W126), the W124 was designed to offer a blend of luxury, durability, and advanced engineering. The 1989 facelift brought subtle but significant improvements to the vehicle, solidifying its reputation as a benchmark for build quality and passenger safety. The 300 E, with its 3.0-liter inline-six engine, was a popular choice for buyers seeking a refined and capable executive car.
The Mercedes-Benz W124 300 E: A Legacy of Engineering
The W124 series, launched in 1985, was a comprehensive redesign of the preceding W123. Mercedes-Benz aimed to create a vehicle that not only offered superior comfort and performance but also incorporated cutting-edge safety features. The 300 E, introduced later in the production run, benefited from these advancements and established itself as a desirable model within the range. While primarily a European market vehicle, the W124 gained a following in North America due to its robust construction and reputation for longevity. The 300 E specifically appealed to drivers who appreciated a smooth, powerful engine and a comfortable ride.
Engine & Performance
The heart of the 300 E is its M103 E 30 3.0-liter inline-six engine. This naturally aspirated powerplant produced 180 horsepower at 5700 rpm and 255 Nm (188.08 lb-ft) of torque at 4400 rpm. The engine featured multi-port manifold fuel injection and a single overhead camshaft (SOHC) valvetrain. This configuration delivered a smooth and linear power delivery, characteristic of Mercedes-Benz six-cylinder engines of the era. Acceleration from 0 to 100 km/h (0-62 mph) took 8.2 seconds, while 0 to 60 mph was achieved in a calculated 7.8 seconds. The 300 E could reach a maximum speed of 225 km/h (139.81 mph). The engine’s power-to-weight ratio was 7.9 kg/Hp, and its torque-to-weight ratio was 5.6 kg/Nm, contributing to its responsive driving experience. The engine required 6.5 liters (6.87 US quarts) of oil and 9 liters (9.51 US quarts) of coolant for optimal operation.
Design & Features
The W124 300 E is a four-door sedan with a classic, understated design. The 1989 facelift brought minor cosmetic changes, including revised front and rear styling, contributing to a more modern appearance. The interior was characterized by high-quality materials and a focus on comfort. Features included comfortable seating for five passengers, power steering, and an anti-lock braking system (ABS), which was a significant safety advancement for the time. The vehicle’s independent multi-link rear suspension and wishbone front suspension provided a comfortable and controlled ride. The 300 E’s dimensions included a length of 4740 mm (186.61 in), a width of 1740 mm (68.5 in), and a height of 1428 mm (56.22 in). The wheelbase measured 2800 mm (110.24 in). Standard tire size was 195/65 R15 on 6.5J x 15 inch rims. The car’s kerb weight was 1420 kg (3130.56 lbs), with a maximum permissible weight of 1990 kg (4387.2 lbs).
Technical Specifications
| Brand | Mercedes-Benz |
| Model | W124 |
| Generation | W124 (facelift 1989) |
| Type (Engine) | 300 E (180 Hp) |
| Start of production | September, 1989 |
| End of production | November, 1992 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 14.6 l/100 km (16.1 US mpg, 19.3 UK mpg, 6.8 km/l) |
| Fuel consumption (extra urban) | 8 l/100 km (29.4 US mpg, 35.3 UK mpg, 12.5 km/l) |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 8.2 sec |
| Acceleration 0 – 62 mph | 8.2 sec |
| Acceleration 0 – 60 mph | 7.8 sec |
| Maximum speed | 225 km/h (139.81 mph) |
| Weight-to-power ratio | 7.9 kg/Hp |
| Weight-to-torque ratio | 5.6 kg/Nm |
| Power | 180 Hp @ 5700 rpm |
| Power per litre | 60.8 Hp/l |
| Torque | 255 Nm @ 4400 rpm (188.08 lb.-ft. @ 4400 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | M 103 E 30 / 103.983 |
| Engine displacement | 2960 cm3 (180.63 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 88.5 mm (3.48 in.) |
| Piston Stroke | 80.2 mm (3.16 in.) |
| Compression ratio | 9.2:1 |
| Number of valves per cylinder | 2 |
| Fuel injection system | Multi-port manifold injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | SOHC |
| Engine oil capacity | 6.5 l (6.87 US qt | 5.72 UK qt) |
| Coolant | 9 l (9.51 US qt | 7.92 UK qt) |
| Kerb Weight | 1420 kg (3130.56 lbs.) |
| Max. weight | 1990 kg (4387.2 lbs.) |
| Max load | 570 kg (1256.63 lbs.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Length | 4740 mm (186.61 in.) |
| Width | 1740 mm (68.5 in.) |
| Height | 1428 mm (56.22 in.) |
| Wheelbase | 2800 mm (110.24 in.) |
| Front track | 1501 mm (59.09 in.) |
| Rear track | 1491 mm (58.7 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears | 5 gears, manual transmission |
| Front suspension | Wishbone |
| Rear suspension | Independent multi-link suspension |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
| Assisting systems | ABS (Anti-lock braking system) |
| Steering type | Cone worm with recirculation balls |
| Power steering | Hydraulic Steering |
| Tires size | Front/Rear: 195/65 R15 |
| Wheel rims size | Front/Rear: 6.5J x 15 |
The Mercedes-Benz W124 300 E remains a highly regarded vehicle among enthusiasts. Its combination of robust engineering, comfortable ride, and refined performance has ensured its enduring appeal. The W124 series, and the 300 E in particular, represents a high point in Mercedes-Benz’s commitment to building durable and luxurious automobiles.
