This manual covers the 600 SEL, model designation W140, produced for the 1992 and 1993 model years. As a full-size luxury sedan, the W140 represented a significant advancement in automotive engineering, renowned for its exceptional build quality, opulent interior, and sophisticated technology. Key features include the powerful M120 6.0L V12 engine, advanced electronic systems for its time, and a focus on unparalleled ride comfort and cabin quietness, setting new benchmarks in the luxury segment and competing with established rivals. This comprehensive factory service manual provides detailed information essential for the maintenance and repair of your 600 SEL. It covers all major systems, including the V12 M120 engine, automatic transmission, drivetrain, suspension, brakes, steering, and electrical systems. Within its extensive pages, you will find step-by-step repair procedures, diagnostic guides, troubleshooting assistance, and precise technical specifications. This manual is an invaluable resource for owners and technicians alike, enabling them to perform routine maintenance and complex repairs with confidence, ensuring the continued optimal performance and longevity of this prestigious vehicle. 🏷️ Basic Information Identification Make: Mercedes-Benz Model: 600 SEL Generation Generation Name: W140 Codes Chassis Code: W140 Engine Codes: M120 👋 Introduction Market Position Vehicle Class: Full-size Luxury Sedan Target Audience: Affluent buyers seeking ultimate comfort, performance, and prestige Competitive Analysis Key Competitors: BMW 7 Series (E32/E38), Lexus LS 400 (XF10), Rolls-Royce Silver Spirit/Spur Key Features Engine Highlight: M120 6.0L V12 engine, one of Mercedes-Benz's first production V12s Technology Highlight: Advanced (for its time) electronic systems, sophisticated suspension and comfort features Interior Luxury: Exceptional build quality, premium materials, spacious and opulent cabin Manual Value Proposition Owner Empowerment: Enables owners to confidently perform repairs and maintenance, saving on professional labor costs. Technical Resource: Provides the same in-depth information utilized by professional Mercedes-Benz technicians. 📋 Manual Details Coverage Areas Applicable Years: 1992, 1993 Page Count Estimated Page Count: Extensive (typically 2000+ pages for comprehensive Mercedes service manuals) Manual Type Manual Type: Factory Service Manual / Repair Manual Language Language: English Format File Format: PDF (Downloadable) 📖 Manual Coverage Systems Covered Engine: V12 M120 Engine (including timing, fuel injection, cooling, lubrication, exhaust) Transmission: Automatic Transmission (4-speed 4G-TRONIC) and Manual Transmission (less common for SEL, but coverage may exist for commonalities) Drivetrain: Rear-wheel Drive, Driveshaft, Axles, Differential Suspension: Front and Rear Suspension, Level Control (ADS - Active Damping System), Self-Leveling Suspension Brakes: Hydraulic Brake System (ABS), Parking Brake, Brake Fluid Maintenance Steering: Power Steering System, Steering Column Electrical System: Complete Wiring Schematics, Lighting, Ignition System, Battery, Charging System, Starting System Climate Control: Air Conditioning (AC) System, Heating System, Ventilation, Filters Body And Chassis: Body Structure, Corrosion Inspection, Water Leakage, Doors, Hood, Sunroof, Soft Top (if applicable to specific trims), Interior Panels Fuel System: Fuel Tank, Fuel Pump, Fuel Filter, Fuel Lines, Injection System Components Procedures Included Routine Maintenance: Oil and Filter Changes, Fluid Level Checks, Filter Replacements (Air, Fuel, Cabin), Belt Inspections Engine Repair: Valve Clearance Adjustment, Injection Timing, Spark Plug Replacement, Engine Mounts, Intake/Exhaust Manifold Seating Transmission Service: Fluid and Filter Changes, Fluid Level Corrections, Clutch System Checks Brake Service: Brake Fluid Replacement, Pad and Disc Inspection, Parking Brake Adjustment, Brake Testing Suspension And Steering Service: Ball Joint Inspection, Level Control Fluid Checks, Wheel Alignment Checks (implied by tire/wheel inspection) Electrical Diagnostics: Wiring Diagram Interpretation, Component Testing, Fault Finding Troubleshooting: Step-by-step diagnostic procedures for various systems Rebuilding And Refurbishment: Procedures for rebuilding major components Technical Depth Depth: Comprehensive, covering diagnostics, repair, rebuild, and refurbishment. Equivalent to factory technician information. Detail Level: Step-by-step instructions, diagrams, illustrations, and specifications 📊 Manual Specifications File Format PDF Quality: High Resolution, Searchable Text (typically) Printability: Printable pages for workshop use Binding Type Binding Type: N/A (Digital PDF Download) Paper Type Paper Type: N/A (Digital PDF Download) ⚙️ Engine Specifications Primary Engine Engine Type: V12, SOHC Displacement: 5987 cc (6.0 Liters) Bore X Stroke: 89.0 mm x 78.9 mm Compression Ratio: 10.0:1 Performance Horsepower: 389 hp @ 5200 rpm (approx.) Torque: 420 lb-ft @ 3800 rpm (approx.) Fuel System Fuel Delivery: Bosch LH-Jetronic Fuel Injection (Multi-point) Fuel Type: Premium Unleaded Gasoline (91+ octane recommended) Maintenance Engine Oil Type: MB 229.1 Specification (e.g., 15W-40 or 10W-40) Engine Oil Capacity: 8.0 Liters (approx. 8.5 US Quarts) with filter Spark Plugs: Long-life iridium or platinum type, 2 per cylinder (12 total) Coolant Type: Mercedes-Benz Approved Coolant (e.g., G48 or equivalent blue/green type) Coolant Capacity: 12.0 Liters (approx. 12.7 US Quarts) 🔧 Transmission Standard Transmission Type: 4-speed Automatic (4G-TRONIC 722.3 or 722.4 series) Optional Optional Transmission: N/A for SEL model (typically only automatic offered) Features Transmission Features: Electronically controlled, Torque Converter Lock-up, Comfort/Sport Modes Maintenance Transmission Fluid Type: MB 236.1 Specification (e.g., Dexron II or equivalent) Transmission Fluid Capacity: 7.5 Liters (approx. 7.9 US Quarts) for fluid and filter change 📐 Dimensions Exterior Length: 5163 mm (203.3 inches) Width: 1886 mm (74.3 inches) Height: 1487 mm...