🏷️ Basic Information Identification Make: Mercedes-Benz Model: S320 Year: 1997 Chassis Code: W140 Codes Engine Code: M104.990 👋 Introduction Market Position Positioning: A premium luxury sedan, the S320 represented the pinnacle of Mercedes-Benz engineering and comfort for its era. Competitive Analysis Competitors: Competed with other high-end luxury sedans such as the BMW 7 Series, Lexus LS, and Audi A8. Key Features Luxury: Renowned for its sophisticated ride, high-quality interior materials, advanced features, and quiet cabin. Technology: Introduced or refined many automotive technologies that are commonplace today. Manual Utility User Base: Suitable for professional mechanics, DIY enthusiasts, and owners seeking to understand their vehicle. Cost Savings: Enables owners to perform repairs themselves or to have informed discussions with service technicians, potentially saving significant costs. 📋 Manual Details Coverage Areas Primary Coverage: Service and Repair Scope: All models and configurations for the 1997 S320 Page Count Estimated Pages: > 1000 Manual Type Type: Service & Repair Manual Language Language: English Format Format: Digital (PDF) Compatibility: Works on all computers using Adobe Acrobat reader Operating Systems: Mac, Windows Printability Print Capability: Printable pages as needed 📖 Manual Coverage Systems Covered Powertrain: Engine mechanical, fuel system, ignition system, cooling system, exhaust system Drivetrain: Transmission (automatic), driveshaft, differential, axles Chassis: Suspension (front and rear), steering system, braking system (including ABS), wheels and tires Electrical: Complete wiring schematics, starting and charging system, lighting, instrumentation, body electronics, power accessories (windows, locks, seats), climate control electronics, SRS (Airbag) system Body: Exterior body panels, interior trim, doors, windows, locks, glass, sunroof, seat mechanisms Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and changes, spark plug replacement, belt inspection and replacement, brake pad replacement, general inspections Troubleshooting: Diagnostic procedures for common faults, symptom-based troubleshooting guides, error code interpretation Repair: Detailed step-by-step repair instructions for all major components and systems, including engine internal repairs, transmission overhaul, suspension component replacement, brake system repairs, electrical component diagnosis and replacement Installation: Instructions for replacing various components and parts Technical Depth Depth: Comprehensive, covering from basic maintenance to advanced diagnostics and complete rebuilds Detail Level: Includes detailed part layouts, torque specifications, clearances, and diagnostic flowcharts 📊 Manual Specifications File Format File Type: PDF Searchability: Likely searchable text within PDF sections Print Quality Resolution: High quality, suitable for clear printing of diagrams and text Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) Organization Structure: Over 70 separate PDF sections, likely organized by system or component ⚙️ Engine Specifications Primary Engine Configuration: Inline-6 (Straight-6) Displacement: 3.2 Liters (3199 cc) Valvetrain: DOHC (Dual Overhead Camshafts), 4 valves per cylinder Performance Horsepower: Approx. 228 hp @ 5500 rpm Torque: Approx. 232 lb-ft @ 3750 rpm Fuel System Induction: Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline (Premium Recommended) Cooling System Type: Pressurized Liquid Cooling System Lubrication Oil Capacity: Approx. 8.0 Liters (8.5 US Quarts) - refer to manual for exact capacity and specific oil grade 🔧 Transmission Standard Type: 4-Speed Automatic Transmission (722.6 '5G-TRONIC' variant introduced later in the W140 generation, but the 1997 S320 typically uses the 4-speed) Features Modes: Standard and Economy (E) modes Fluid Specifications Fluid Type: Mercedes-Benz Automatic Transmission Fluid (ATF) - e.g., MB-Approval 236.1 or 236.3 for the 4-speed; MB-Approval 236.10 or 236.14 for the 5-speed. Consult manual for exact specification. 📐 Dimensions Exterior Length: Approx. 5113 mm (201.3 inches) Width: Approx. 1886 mm (74.3 inches) Height: Approx. 1434 mm (56.5 inches) Weights Curb Weight: Approx. 1800-1900 kg (3968-4189 lbs) - varies by equipment 🛡️ Safety Features Ratings Crash Test Data: While specific NHTSA/IIHS ratings for 1997 may be limited, the W140 chassis was engineered with advanced safety structures for its time. Passive Features Airbags: Driver and front passenger airbags (SRS) Seatbelts: Pre-tensioning seatbelts Construction: Reinforced body structure, crumple zones Active Features ABS: Anti-lock Braking System (ABS) Traction Control: Acceleration Slip Regulation (ASR) standard on some models/markets 💡 Technology Features Infotainment Audio System: Premium sound system, often with Bose components, AM/FM/Cassette/CD capabilities depending on original options. Navigation: Optional factory navigation system available on some models. Driver Assistance Cruise Control: Standard cruise control. Parking Assistance: Optional rear park assist (Parktronic) not commonly found on this year, more prevalent in later models. Connectivity Telematics: Early forms of telematics or cellular phone integration might be present as options. Comfort Features Climate Control: Dual-zone automatic climate control (Thermotronic), often with air filtration. Seats: Power-adjustable front seats with memory, heated seats, multi-contour seats available as options. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500 to 10,000 miles (12,000 to 16,000 km) or annually, depending on driving conditions and oil quality. Refer to manual for precise intervals and service 'A'/'B' indicators. Major Service: Key service intervals for spark plugs, transmission fluid, coolant, and brake fluid typically fall between 30,000 and 60,000 miles. Consult the manual for detailed schedule. Fluid Specifications Engine Oil: API...