🏷️ Basic Information Identification Make: Mercedes-Benz Model: 300E 4MATIC Body Style: Sedan Chassis Code: W124 Model Years Covered: 1990-1993 Engine Variant: 3.0L Inline-6 Codes Engine Code Common: M103.980 Transmission Code Common: 722.4 (4-speed automatic) 👋 Introduction Market Position Positioning: The Mercedes-Benz W124 chassis represented the pinnacle of German engineering and build quality in its era, offering robust performance, exceptional durability, and sophisticated comfort, making it a highly sought-after luxury sedan and a future classic. Competitive Analysis Competitors: Competed directly with luxury sedans from BMW (E34 5-Series), Audi (V8 Quattro), and Lexus (LS 400), offering a blend of performance, comfort, and advanced engineering. Key Features Design: Aerodynamically efficient design, robust chassis construction, independent multi-link rear suspension, high-quality interior materials, advanced safety features for its time. Powertrain: Smooth and powerful M103 3.0L inline-six engine, coupled with the durable 4-speed automatic transmission and the advanced 4MATIC all-wheel-drive system for enhanced traction and stability. Manual Value Proposition Benefit To Owner: Empowers owners to perform detailed maintenance, accurate diagnostics, and complex repairs, saving on dealership costs and preserving the longevity and value of their classic Mercedes-Benz. 📋 Manual Details Coverage Areas Scope: Comprehensive service and repair Page Count Estimated Pages: Over 1500 (typical for comprehensive W124 service manuals) Manual Type Type: Factory-authorized Service Manual / Workshop Repair Manual Language Language: English Format Format: Digital PDF (Instant Download) 📖 Manual Coverage Systems Covered Engine: All aspects including M103 engine diagnostics, tune-up, component testing, rebuild procedures, fuel injection (Bosch KE-Jetronic), ignition, emissions control. Transmission: 4-speed automatic transmission (722.4) service, diagnostics, fluid changes, seal replacement, torque converter. Drivetrain: 4MATIC all-wheel-drive system maintenance, troubleshooting, differential service, driveline components. Suspension: Front and rear suspension diagnostics, component replacement (struts, shocks, control arms, ball joints, bushings), alignment specifications. Brakes: Hydraulic braking system service, ABS (Anti-lock Braking System) diagnostics, rotor and pad replacement, brake fluid specifications, bleeding procedures. Steering: Power steering system service, component replacement, troubleshooting, steering column adjustments. Electrical System: Complete wiring diagrams, fuse and relay locations, starting and charging system diagnostics, battery service, lighting, horn, power accessories. Body And Chassis: Body panel repair, door and window mechanisms, interior trim removal, structural components, rust prevention. HVAC: Climate control system diagnostics, refrigerant service, blower motor, heater core, A/C compressor, cabin filter replacement. Fuel System: Fuel pump, fuel filter, fuel lines, fuel tank, fuel pressure regulator, injectors (KE-Jetronic). Exhaust System: Exhaust manifold, catalytic converter, muffler, O2 sensors (if applicable). Procedures Included Maintenance: Oil changes, filter replacements (oil, fuel, air, cabin), spark plug replacement, fluid level checks and top-offs, belt inspection and replacement. Diagnostics: System-specific troubleshooting guides, symptom-based diagnostics, fault code identification (OBD I era systems if applicable), component testing. Repair: Step-by-step instructions for component removal and installation, engine internal component repair, transmission overhaul, brake system overhauls, suspension component replacement. Troubleshooting: Detailed flowcharts and diagnostic trees for common and uncommon problems across all vehicle systems. Specifications And Tolerances: Torque specifications for all fasteners, engine clearance measurements, alignment angles, fluid capacities, electrical resistance values. Wiring Diagrams: Complete, high-resolution wiring diagrams for all electrical systems, including engine management, lights, accessories, and power windows. Technical Depth Depth: Expert level, covering everything from routine maintenance to complete engine and transmission overhauls, including advanced diagnostic procedures. 📊 Manual Specifications File Format Format: Searchable PDF Quality: High-resolution scans, clear text and images Searchability: Full text searchable for quick information retrieval. Print Quality Printable: Yes, optimized for home or professional printing. Binding Type Binding: N/A (Digital) Paper Type Paper: N/A (Digital) Software Requirements Required Software: Standard PDF reader (e.g., Adobe Acrobat Reader) ⚙️ Engine Specifications Primary Engine Engine Type: Naturally Aspirated Inline-6 Cylinder Displacement: 2960 cc (3.0 Liters) Bore X Stroke: 88.5 mm x 80.25 mm Compression Ratio: 9.2:1 Performance Horsepower: Approx. 189 hp @ 5700 rpm Torque: Approx. 204 lb-ft @ 4400 rpm Fuel System Fuel Delivery: Bosch KE-Jetronic Electronic Fuel Injection Fuel Type: Unleaded Premium Gasoline (91+ Octane Recommended) Lubrication Oil Capacity: Approx. 8.0 liters (with filter) Recommended Oil Viscosity: SAE 10W-30 or 10W-40 (depending on climate) 🔧 Transmission Standard Type: 4-speed Automatic (722.4) Drivetrain: 4MATIC All-Wheel Drive Features Modes: Comfort and Sport modes Fluid Type Transmission Fluid: MB-Approval 236.6 (e.g., Mobil ATF 220, Pentosin ATF 1) Fluid Capacity Capacity: Approx. 8.0 liters (total, including torque converter) 📐 Dimensions Exterior Length: 4740 mm (186.6 in) Width: 1740 mm (68.5 in) Height: 1430 mm (56.3 in) Wheelbase: 2795 mm (110.0 in) Weights Curb Weight: Approx. 1660 kg (3660 lbs) - Varies with options Gross Vehicle Weight Rating: Approx. 2110 kg (4650 lbs) Wheels And Tires Standard Wheel Size: 15-inch alloy Standard Tire Size: 205/65R15 Bolt Pattern: 5x112 Center Bore: 66.5 mm 🛡️ Safety Features Ratings Era Specific Safety: Designed with advanced safety features for its time, including a robust crumple zone structure, reinforced safety cell, and energy-absorbing materials. Passive Features Airbags: Driver's side airbag standard from 1991 model year onward; optional...