🏷️ Basic Information Identification Make: Mercedes-Benz Model: S-Class Chassis Code: W140 Generation Generation Name: First Generation Codes Model Code Range: 140.0xx 👋 Introduction Market Position Segment: Full-size Luxury Sedan Era: The 'Technological Showcase' of its time Competitive Analysis Key Competitors: BMW 7 Series (E38), Lexus LS 400 (XF20), Audi V8/A8 (D11/D2), Jaguar XJ (XJ40/X300) Key Features Defining Characteristics: Exceptional build quality, advanced technology for its era, spacious and opulent interior, powerful V8 and V12 engines Target Audience: Affluent individuals seeking supreme comfort, advanced engineering, and prestige 📋 Manual Details Coverage Areas Years Covered: 1992-1999 Engine Variants Covered: All engine types Model Variants Covered: All W140 Series models Page Count Estimated Page Count: Extensive (Detailed repair manuals for this era are typically hundreds of pages) Manual Type Type: Service and Repair Shop Manual Language Language: English Format Digital Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel system, ignition system, exhaust system, engine management Drivetrain: Transmission (automatic), driveshafts, differential, axles Chassis: Suspension (front and rear, including hydropneumatic/level control systems), steering, brakes (hydraulic, ABS), wheels and tires Electrical: Engine electrical, body electrical, lighting, instrumentation, infotainment, power accessories, CAN bus systems (where applicable for later models) Body And Interior: Body panels, doors, windows, seats, HVAC (heating, ventilation, air conditioning), interior trim, security systems Procedures Included Maintenance: Routine servicing, fluid changes, filter replacements, inspections Diagnostics: Troubleshooting guides, symptom-based diagnostics, fault code interpretation (OBD-I and early OBD-II) Repair: Step-by-step repair instructions for all major components and systems Installation: Installation procedures for replacement parts and accessories Wiring Diagrams: Comprehensive electrical wiring diagrams for all systems Technical Depth Depth: Professional quality, in-depth coverage suitable for DIY enthusiasts and professional mechanics 📊 Manual Specifications File Format File Type: PDF Searchability: Searchable text within PDF Print Quality Printability: Printable pages Binding Type Binding: Digital Download (N/A for print binding) Paper Type Paper: Digital (N/A for print paper type) ⚙️ Engine Specifications Primary Engine Engine Codes And Variants: M119 (4.2L V8, 5.0L V8), M120 (6.0L V12) Performance M119 Engine Specs: 4.2L (4196cc) DOHC V8, 32 valves, ~275-280 hp, ~295-300 lb-ft torque (varies by year/market); 5.0L (4973cc) DOHC V8, 32 valves, ~315-322 hp, ~347-354 lb-ft torque M120 Engine Specs: 6.0L (5987cc) DOHC V12, 48 valves, ~389-394 hp, ~420-428 lb-ft torque Fuel System Injection Type: Bosch Motronic Electronic Fuel Injection (EFI) Fuel Type: Premium Unleaded Gasoline (91+ octane) 🔧 Transmission Standard Transmission Type: 4-speed Automatic (722.3/722.6 '722.6' for later models) Optional Transmission Type: 5-speed Automatic (722.6 '722.6' introduced with the M119 5.0L and M120) Features Drive System: Rear-Wheel Drive (RWD) Transmission Control: Electronic control unit (ECU) for shift points and performance tuning 📐 Dimensions Exterior Length: Approx. 5113-5220 mm (17.1-17.2 ft) Width: Approx. 1886 mm (6.2 ft) Height: Approx. 1440-1447 mm (4.7-4.8 ft) Weights Curb Weight: Approx. 1900-2200 kg (4189-4850 lbs) depending on engine and equipment 🛡️ Safety Features Ratings Crash Test Performance: Designed to exceed contemporary safety standards, featuring robust body structure and advanced safety systems for its era. Active Features ABS: Standard Anti-lock Braking System (ABS) Esp: Optional Electronic Stability Program (ESP) for later models Passive Features Airbags: Driver and passenger airbags, optional side airbags Seatbelts: Pretensioner seatbelts 💡 Technology Features Infotainment Audio System: High-fidelity audio systems (e.g., Bose optional), cassette and CD players Navigation: Optional factory navigation system (early generation) Driver Assistance Cruise Control: Standard cruise control Parking Assist: Optional parking sensors (early forms) Connectivity Communication: Early cellular phone integration (optional) 🔧 Maintenance Service Intervals Oil Change: Typically every 7,500-10,000 miles or 12 months, whichever comes first (refer to manual for specific engine) Major Service: Spark plugs, transmission fluid/filter, coolant, brake fluid service intervals vary by model and mileage (e.g., 30,000-60,000 miles) Fluid Specifications Engine Oil: API SJ or higher, SAE 0W-40 or 5W-40 synthetic (check manual for exact specs and viscosity) Transmission Fluid: MB 236.81 (for 722.6 transmissions), ATF (for 722.3/722.5 transmissions) - Refer to manual for precise specification Coolant: Mercedes-Benz approved coolant concentrate (e.g., G48) mixed with distilled water Brake Fluid: DOT 4 Known Issues Wiring Harnesses: Biodegradable insulation on wiring harnesses can degrade, leading to electrical faults. Vacuum System: Vacuum leaks from aged hoses can affect various systems, including central locking and idle control. Door Locks: Central locking vacuum pump failures or leaks. Suspension: Wear in control arm bushings, front strut mounts, and rear self-leveling suspension components. Electronics: Age-related failures in electronic control units (ECUs), climate control modules, and power window regulators. 📚 Vehicle History Brand Heritage Legacy Of Luxury: The W140 continues Mercedes-Benz's long-standing tradition of producing supremely engineered and luxurious automobiles. Model Evolution Development Context: Conceived as a successor to the W126 S-Class, the W140 represented a significant leap in size, technology, and safety, often referred to as the 'Sonderklasse' (Special Class). Production Production Years: 1991-1998 (for model year 1992-1999 worldwide) Production Locations: Germany 🏆 Awards & Recognition Recognitions Reputation: Widely...