🏷️ Basic Information

Make:

Mercedes-Benz

Model:

300E 4Matic

Chassis Code:

W124

Model Code Engine:

M103 (3.0L Inline-6)

Model Code Drivetrain:

4Matic (All-Wheel Drive)

Generation Code:

Third Generation (Post-facelift)

Model Years Covered:

1990-1993

👋 Introduction

Vehicle Segment:

Mid-size Luxury Sedan (E-Class segment).

Target Audience:

Affluent individuals, professionals, and those valuing build quality, comfort, and engineering excellence.

Key Competitors:

BMW 5 Series (E34), Audi 100/A6 (C3/C4), Lexus LS 400 (larger segment but perceived competitor), Volvo 740/940.

Brand Reputation:

Renowned for engineering, build quality, safety, and luxury.

Model Lineage:

Part of the highly respected W124 E-Class, known for its robustness and longevity.

Drivetrain Offering:

The 4Matic all-wheel-drive system provided enhanced traction and stability, a significant differentiator.

Manual Value Proposition:

Provides access to the same expert-level repair information used by Mercedes-Benz dealerships, empowering owners and independent mechanics.

📋 Manual Details

Technical Scope:

Comprehensive service and repair for all vehicle systems.

Geographic Coverage:

Global (as dealership technicians would use it).

Estimated Page Count:

Extensive (specific count not provided, but implied to be comprehensive).

Type:

Factory Service Workshop Manual / Repair Manual

Language:

English (implied by dealership technician reference).

Format:

HTML/Flash Menu with PDF

📖 Manual Coverage

Engine:

Complete overhaul, diagnostics, component testing, timing, fuel injection, ignition, cooling, lubrication.

Transmission:

Automatic transmission service, overhaul, diagnostics, torque converter, fluid service.

Drivetrain:

4Matic all-wheel drive system, differentials, driveshafts, CV joints, transfer case.

Brakes:

Hydraulic system, ABS (Anti-lock Braking System), brake pad/rotor replacement, caliper service, bleeding procedures, parking brake.

Suspension:

Front and rear suspension components, shock absorbers, struts, control arms, ball joints, bushings, alignment procedures.

Steering:

Power steering system, steering gear, tie rods, steering column, alignment.

Electrical System:

Battery, charging system, starter, lighting, wipers, horn, power windows, central locking, ignition switch, fuses, relays, wiring diagrams.

Body:

Body shell, doors, hood, trunk, interior trim (seats, dashboard, door panels), exterior trim, bumpers, glass replacement.

Climate Control:

HVAC system, air conditioning, heating, ventilation, blower motor, evaporator, compressor, refrigerant service.

Fuel System:

Fuel tank, fuel pump, fuel filter, fuel injectors, fuel pressure regulation, evaporative emissions control (EVAP).

Exhaust System:

Exhaust manifolds, catalytic converter, muffler, exhaust pipes, oxygen sensors.

Maintenance:

Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement, belt inspection and replacement.

Repair:

Engine component replacement, transmission overhaul, brake system repairs, suspension component replacement, electrical troubleshooting, body panel repair.

Diagnostics:

Troubleshooting guides, diagnostic trouble codes (DTCs), symptom-based diagnosis, component testing procedures.

Rebuilds:

Complete engine and transmission rebuild procedures, including specifications and tolerances.

Calibration And Adjustment:

Engine timing, throttle body adjustment, suspension alignment.

Depth:

Expert-level, suitable for professional technicians and advanced DIY enthusiasts.

Detail Level:

Step-by-step instructions, detailed diagrams, torque specifications, component tolerances, special tool requirements.

📊 Manual Specifications

Primary Format:

PDF

Navigation Interface:

HTML/Flash Menu

Searchability:

Likely searchable within PDF sections.

Printability:

Printable pages for physical reference.

Binding:

N/A (Digital Download)

Paper:

N/A (Digital Download)

Operating Systems:

Windows 95, 98, ME, XP, Vista, Windows 7.

⚙️ Engine Specifications

Engine Type:

3.0 Liter, SOHC Inline 6-cylinder

Engine Code:

M103.980

Bore X Stroke:

88.5 mm x 80.25 mm

Displacement:

2960 cc (3.0 Liters)

Compression Ratio:

9.2:1

Horsepower:

189 hp @ 5,700 rpm (approx.)

Torque:

195 lb-ft @ 4,400 rpm (approx.)

Fuel Delivery:

Bosch KE-Jetronic CIS-E (Continuous Injection System - Electronic) Fuel Injection

Fuel Type:

Unleaded gasoline, 91 octane (RON+MON)/96 AKI recommended

Ignition System:

Electronic ignition with dual ignition coils

Engine Control Unit:

ME 1.0 or similar electronic control unit

🔧 Transmission

Type:

4-speed Automatic Transmission (4G-TRONIC)

Type:

N/A for this model/year with 4Matic.

Drivetrain Type:

4Matic All-Wheel Drive (permanent)

Transfer Case:

Integrated into the transmission housing.

Differentials:

Center differential (open), front and rear differentials (open) with optional LSD for rear.

Transmission Fluid Type:

MB Specification 236.1 (e.g., ATF Dexron II D or equivalent)

Transmission Fluid Capacity:

Approx. 8.0 Liters (check manual for exact dry fill)

📐 Dimensions

Length:

Approx. 188.1 inches (4,778 mm)

Width:

Approx. 69.3 inches (1,760 mm)

Height:

Approx. 55.1 inches (1,400 mm)

Wheelbase:

Approx. 110.8 inches (2,817 mm)

Front Track:

Approx. 58.3 inches (1,480 mm)

Rear Track:

Approx. 57.4 inches (1,458 mm)

Curb Weight:

Approx. 3,600-3,800 lbs (1,630-1,725 kg) depending on options

Gross Vehicle Weight Rating:

Approx. 4,700 lbs (2,130 kg)

Towing Capacity:

Not typically specified for this model, generally not intended for towing.

🛡️ Safety Features

Crash Test Ratings:

N/A for this era's standardized ratings (e.g., NHTSA/IIHS); known for robust safety cage and passive safety features.

ABS:

Standard Anti-lock Braking System (ABS)

Traction Control:

ASR (Anti-Slip Regulation) available on some models.

Airbags:

Driver-side airbag standard from late 1990/early 1991 models onwards. Passenger airbag optional.

Seat Belts:

3-point inertia-reel seat belts with pretensioners for front occupants.

Body Construction:

High-strength steel chassis and safety cage construction.

Headlights:

Halogen headlights with integrated fog lamps.

💡 Technology Features

Audio System:

Factory installed cassette or CD players with AM/FM radio. Upgradable to modern units.

Display:

Minimal display for radio presets and climate control indicators. No integrated navigation or advanced displays.

ABS:

Standard Anti-lock Braking System (ABS) for enhanced stopping control.

Traction Control:

Optional ASR (Anti-Slip Regulation) for improved traction during acceleration.

Connectivity Features:

Limited to basic factory radio and optional power antenna. No integrated Bluetooth or USB connectivity.

Power Features:

Power windows, power mirrors, power door locks, power antenna (often), power adjustable seats (optional).

🔧 Maintenance

Oil Change Interval:

Every 7,500 - 10,000 miles (12,000 - 16,000 km) or 1 year, whichever comes first, with quality synthetic oil.

Transmission Service Interval:

Every 30,000 - 60,000 miles (50,000 - 100,000 km), inspect fluid condition.

Coolant Flush Interval:

Every 2 years or 30,000 miles (50,000 km).

Spark Plug Replacement Interval:

Approx. 30,000 miles (50,000 km) for standard spark plugs.

Brake Fluid Change Interval:

Every 2 years, regardless of mileage.

Engine Oil Specification:

MB 229.1 or API SJ/SL/SM, SAE 5W-40 or 10W-40 (refer to manual for exact viscosity based on climate).

Engine Oil Capacity:

Approx. 8.0 Liters (with filter change)

Coolant Specification:

MB Specification 325.0 (Ethylene Glycol based, typically blue or green)

Power Steering Fluid Type:

MB Specification 236.3 (e.g., ATF Dexron II or Pentosin CHF 11S)

Brake Fluid Type:

DOT 3 or DOT 4

Wiring Harness:

Degradation of biodegradable insulation on some wiring harnesses, leading to shorts and electrical gremlins. Often referred to as the 'main wiring harness' issue. (This manual would detail inspection and replacement).

Head Gasket:

While robust, head gasket leaks can occur over time due to age and heat cycles. (Manual covers removal and installation).

Fuel Pump Relay:

Failure of the fuel pump relay can cause no-start conditions. (Manual provides diagnostic procedures).

Climate Control Vacuum Lines:

Degradation of vacuum lines for the climate control system can lead to malfunctioning HVAC. (Manual details system and replacement).

4Matic System Maintenance:

Regular fluid changes for the transfer case and differentials are crucial for longevity. (Manual specifies fluids and procedures).

📚 Vehicle History

Heritage:

Mercedes-Benz has a long history of automotive innovation, safety, and luxury dating back to the late 19th century.

W124 Introduction:

The W124 chassis was introduced in 1984, evolving from the W123 series.

W124 Facelifts:

Received a significant facelift in 1989, introducing wider body-side moldings, revised bumpers, and new wheel designs, which defined the 1990-1993 models.

4Matic Introduction:

The 4Matic all-wheel-drive system was introduced to the W124 range in the mid-1980s and became a popular option for enhanced all-weather capability.

Production Years:

W124 E-Class: 1984-1995. 300E 4Matic specific production for this generation within the specified years.

Manufacturing Locations:

Germany (main production), with potential assembly in other international locations.

🏆 Awards & Recognition

Automotive Press:

The W124 chassis, including models like the 300E, consistently received high praise from automotive journalists for its build quality, ride comfort, and engineering. Often cited as one of the best-built Mercedes of its era.

Reliability Perceptions:

While requiring diligent maintenance, these vehicles are generally perceived as reliable and durable when properly cared for.

Manual Authenticity:

Stated as the 'very same manual that your local dealer technician uses', indicating factory-issued content.