The Mercedes-Benz W124 E 300 D Automatic, produced from December 1992 to August 1995, represents a compelling blend of luxury, durability, and fuel efficiency within the iconic W124 series. Positioned as a mid-range offering in the E-Class lineup, it catered to buyers seeking a refined diesel experience without the higher price tag of the flagship models. This variant, powered by the OM606.910 3.0-liter inline-six diesel engine paired with a four-speed automatic transmission, became a popular choice for both European and North American markets, known for its robust construction and longevity. The W124 platform itself was a significant step forward for Mercedes-Benz, introducing advancements in safety, comfort, and build quality that set a new standard for mid-size executive cars.
Technical Specifications
| Brand | Mercedes-Benz |
| Model | E-class |
| Generation | E-class (W124) |
| Type (Engine) | E 300 D (136 Hp) Automatic |
| Start of production | December, 1992 |
| End of production | August, 1995 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Sedan |
| Seats | 5 |
| Doors | 4 |
| Fuel consumption (urban) | 9.3 l/100 km (25.3 US mpg) |
| Fuel consumption (extra urban) | 6 l/100 km (39.2 US mpg) |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 13 sec |
| Acceleration 0 – 62 mph | 13 sec |
| Acceleration 0 – 60 mph | 12.4 sec |
| Maximum speed | 197 km/h (122.41 mph) |
| Weight-to-power ratio | 10.8 kg/Hp |
| Weight-to-torque ratio | 7 kg/Nm |
| Power | 136 Hp @ 5000 rpm |
| Torque | 210 Nm @ 2200 rpm (154.89 lb.-ft. @ 2200 rpm) |
| Engine layout | Front, Longitudinal |
| Engine Model/Code | OM 606 D 30 / 606.910 |
| Engine displacement | 2996 cm3 (182.83 cu. in.) |
| Number of cylinders | 6 |
| Engine configuration | Inline |
| Cylinder Bore | 87 mm (3.43 in.) |
| Piston Stroke | 84 mm (3.31 in.) |
| Compression ratio | 22:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Precombustion chamber injection |
| Engine aspiration | Naturally aspirated engine |
| Valvetrain | DOHC |
| Engine oil capacity | 7.5 l (7.93 US qt | 6.6 UK qt) |
| Coolant | 9 l (9.51 US qt | 7.92 UK qt) |
| Kerb Weight | 1470 kg (3240.8 lbs.) |
| Max. weight | 2050 kg (4519.48 lbs.) |
| Max load | 580 kg (1278.68 lbs.) |
| Trunk (boot) space – minimum | 520 l (18.36 cu. ft.) |
| 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 | 1430 mm (56.3 in.) |
| Wheelbase | 2800 mm (110.24 in.) |
| Front track | 1501 mm (59.09 in.) |
| Rear (Back) track | 1491 mm (58.7 in.) |
| Drivetrain Architecture | The Internal combustion engine (ICE) drives the rear wheels of the vehicle. |
| Drive wheel | Rear wheel drive |
| Number of gears and type of gearbox | 4 gears, automatic 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 wheel tires: 195/65 R15Rear wheel tires: 195/65 R15 |
| Wheel rims size | Front wheel rims: 6.5J x 15Rear wheel rims: 6.5J x 15 |
Powertrain & Engine Architecture
The heart of the E 300 D Automatic is the OM606.910, a 2,996 cc inline-six cylinder diesel engine. This engine is renowned for its durability and relatively smooth operation for a diesel of its era. It utilizes a precombustion chamber injection system, a hallmark of Mercedes-Benz diesel technology at the time. This system involves injecting fuel into a small precombustion chamber within the cylinder head, where it ignites and then ignites the main charge in the cylinder. This design promotes more complete combustion and reduces engine noise. The engine features a double overhead camshaft (DOHC) valvetrain, contributing to improved breathing and efficiency. The four-speed automatic transmission, a 722.3 unit, was a common choice for Mercedes-Benz vehicles of this period. While not as sophisticated as modern automatics, it provided smooth and reliable shifting, well-suited to the engine’s torque characteristics.
Driving Characteristics
The E 300 D Automatic offered a comfortable and relaxed driving experience. With 136 horsepower and 210 Nm (155 lb-ft) of torque, acceleration was adequate but not sporty. The 0-60 mph time of around 12.4 seconds reflects this. The automatic transmission, while smooth, did contribute to some power loss compared to the available five-speed manual. However, the engine’s strong low-end torque made it well-suited for highway cruising and effortless overtaking. The gear ratios were optimized for fuel efficiency and comfortable operation, rather than outright performance. Compared to the higher-output E 320 models, the E 300 D Automatic prioritized fuel economy and refinement over raw power.
Equipment & Trim Levels
The E 300 D Automatic typically came standard with features expected of a luxury sedan in the early 1990s. This included power windows, central locking, air conditioning, and a high-quality audio system. Interior upholstery was typically cloth, with leather options available as an upgrade. The dashboard layout was functional and well-built, with clear instrumentation. Optional extras included a sunroof, heated seats, and upgraded sound systems. The trim level was generally considered mid-range, offering a good balance of features and affordability within the E-Class lineup.
Chassis & Braking
The W124 chassis was known for its robust construction and excellent ride quality. The E 300 D Automatic featured a wishbone front suspension and an independent multi-link rear suspension, providing a comfortable and controlled ride. Braking duties were handled by ventilated discs at the front and solid discs at the rear. Anti-lock braking system (ABS) was standard, enhancing safety. The steering was a recirculating ball system with hydraulic power assistance, offering a good balance of feel and ease of use. Stabilizer bars were fitted front and rear to reduce body roll during cornering.
Market Reception & Comparison
The E 300 D Automatic was well-received by critics and buyers alike. It was praised for its fuel efficiency, durability, and comfortable ride. Compared to the gasoline-powered E 320, the E 300 D offered significantly better fuel economy, making it a popular choice for long-distance drivers. However, the E 320 provided more power and a sportier driving experience. The E 300 D also compared favorably to other diesel-powered luxury sedans of the time, such as the BMW 525td, offering a more refined and comfortable experience. Reliability was a key strength, with many examples still on the road today.
Legacy
The Mercedes-Benz W124 E 300 D Automatic has earned a reputation as a remarkably durable and reliable vehicle. The OM606 engine is particularly well-regarded for its longevity, with many examples exceeding 300,000 miles with proper maintenance. In the used car market, these vehicles are sought after by enthusiasts and those seeking a classic Mercedes-Benz experience. While maintenance can be more expensive than for some modern cars, the robust construction and readily available parts ensure that these vehicles can be kept on the road for many years to come. The E 300 D Automatic remains a testament to Mercedes-Benz’s engineering prowess and commitment to quality.
