🏷️ Basic Information Identification Make: Mercedes-Benz Model: 300E Model Code: W124 (E-Class) Years Covered: 1990, 1991, 1992 Codes Chassis Code: W124.030 Engine Code: M103.980 👋 Introduction Market Position Market Position: The Mercedes-Benz 300E (W124) represented the pinnacle of mid-size luxury sedans in its era, known for its build quality, durability, and sophisticated engineering. This manual caters to owners and technicians who value precision and longevity. Competitive Analysis Competitive Analysis: Competed against vehicles like the BMW 5 Series (E34), Audi 100, and Lexus LS 400. The W124 was often lauded for its superior ride comfort and build integrity compared to some rivals. Key Features Key Features: Robust chassis, advanced independent suspension, sophisticated M103 engine, optional advanced safety features like ABS, excellent interior comfort and ergonomics. 📋 Manual Details Coverage Areas Coverage Areas: All mechanical and electrical systems, bodywork, specifications, maintenance, troubleshooting, repair procedures. Page Count Page Count: Approximately 1500+ pages (estimated, based on typical comprehensive manuals of this era) Manual Type Manual Type: Factory Service Manual / Repair Manual Language Language: English Format Format: Digital (PDF likely, though original could be printed) 📖 Manual Coverage Systems Covered Engine: Engine mechanical, lubrication system, cooling system, fuel system (KE-Jetronic), ignition system, engine management (ECU), exhaust system. Transmission: 4-speed Automatic Transmission (722.4 series) or 5-speed Manual Transmission (G5/27-5), including hydraulics, electronics, and shift control. Drivetrain: Rear-wheel drive, driveshaft, differential, axle shafts. Suspension: Front and rear suspension components, springs, shock absorbers, control arms, bushings, anti-roll bars. Steering: Power steering system, steering column, steering gear. Brakes: Front and rear disc brakes, ABS (Anti-lock Braking System), brake fluid, hydraulic lines, parking brake. Electrical: Battery, charging system, starter motor, lighting system, wipers, horn, power windows, power seats, central locking, instrument cluster, wiring diagrams for all circuits. HVAC: Heating, ventilation, and air conditioning system, climate control components. Body: Body panels, doors, windows, trim, interior components, body sealing. Procedures Included Procedures Included: Regular maintenance, scheduled maintenance, inspections, component removal and installation, adjustment procedures, diagnostic troubleshooting flowcharts, wiring harness repair, engine rebuild procedures, transmission overhaul, clutch replacement (manual), brake bleeding and repair, suspension component replacement, steering system service. Engine Management Diagnostics: Detailed troubleshooting for KE-Jetronic system, including idle control, cold start enrichment, and sensor testing. Diagnostic flowcharts for engine performance issues. Electrical Troubleshooting: Extensive wiring diagrams for all vehicle circuits, with component location guides and diagnostic methods for electrical faults. Chassis Diagnostics: Procedures for checking wheel bearings, steering linkage play, suspension component wear, and alignment specifications. Technical Depth Technical Depth: Comprehensive: Covers basic maintenance to full engine and transmission overhauls, including detailed diagnostic procedures and wiring diagrams. Suitable for professional mechanics and advanced DIY enthusiasts. 📊 Manual Specifications File Format File Format: PDF (typically searchable and bookmarkable) Print Quality Print Quality: High resolution for clear diagrams and text (when printed). Binding Type Binding Type: Not applicable for digital format, but original factory manuals were typically bound or sectioned. Paper Type Paper Type: Not applicable for digital format, but original factory manuals used durable, high-quality paper. ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-Cylinder, Naturally Aspirated Engine Displacement: 2.6 Liters (2599 cc) Engine Code: M103.980 Bore X Stroke: 82.0 mm x 80.5 mm Compression Ratio: 9.2:1 Performance Horsepower: 160 hp (118 kW) @ 5500 rpm (approximate, may vary slightly by market) Torque: 177 lb-ft (240 Nm) @ 4400 rpm (approximate) Fuel System Fuel Delivery: Bosch KE-Jetronic Electronic Fuel Injection with Lambda control Fuel Type: Unleaded Premium Gasoline (91+ Octane) Engine Management ECM Type: Bosch Motronic (specific variant dependent on year/market, e.g., ME2.0) Cooling System Coolant Capacity: Approximately 8.5 Liters (8.9 US quarts) Lubrication System Oil Capacity: 7.5 Liters (7.9 US quarts) with filter change Recommended Oil Viscosity: SAE 10W-30 or 10W-40 (API SG or higher) 🔧 Transmission Standard Transmission Type: 4-Speed Automatic (Model 722.4) Optional Transmission Type: 5-Speed Manual (Model G5/27-5) Features Automatic Features: Lock-up torque converter, electronic/hydraulic control for shifting. Fluid Specifications Automatic Transmission Fluid Type: MB 236.3 (e.g., ATF Dextron II) Fluid Capacity Automatic Transmission Fluid Capacity: Approximately 7.0 Liters (7.4 US quarts) for overhaul, 3.5 Liters for fluid change. Fluid Specifications Manual Transmission Fluid Type: MB 235.1 (e.g., SAE 75W-80 or 75W-90 GL-4) Fluid Capacity Manual Transmission Fluid Capacity: Approximately 1.7 Liters (1.8 US quarts) 📐 Dimensions Exterior Length: 188.2 in (4780 mm) Width: 69.5 in (1765 mm) Height: 55.7 in (1415 mm) Wheelbase: 110.2 in (2800 mm) Front Track: 58.6 in (1488 mm) Rear Track: 57.3 in (1455 mm) Weights Curb Weight: Approximately 3460 lbs (1569 kg) Gross Vehicle Weight Rating: Approximately 4630 lbs (2100 kg) Cargo Trunk Volume: 18.0 cu ft (510 L) 🛡️ Safety Features Ratings NHTSA Frontal Impact: Not directly rated by NHTSA in the modern sense for these years, but known for robust construction. Active Features ABS: Standard (Bosch ABS III) Traction Control: Optional (ASR - Acceleration Skid Control) on some models/markets. Passive...