🏷️ Basic Information Identification Make: Mercedes-Benz Model: S-Class Chassis Code: W140 Body Styles Covered: Sedan (W140), Coupe (C140) 👋 Introduction Market Position Vehicle Segment: Full-size Luxury Sedan (and Coupe) Brand Heritage Association: Represents the pinnacle of Mercedes-Benz engineering and luxury during its production era. Competitive Analysis Key Competitors: BMW 7 Series (E32/E38), Lexus LS 400, Jaguar XJ, Rolls-Royce Silver Spirit. Key Features Manual Value Proposition: Enables DIY owners to perform extensive maintenance and repairs, saving significant costs on dealership servicing. Manual Ease Of Use: Designed for clarity with step-by-step instructions and visual aids, making complex tasks accessible. 📋 Manual Details Coverage Areas Manual Type: Complete Workshop Service Repair Manual Language: English Format: Downloadable PDF Page Count: Extensive (Specific number not provided, but described as 'Complete' and 'A-Z') 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed diagnosis, overhaul, repair of all engine variants including M119 (V8) and M120 (V12). Engine Management: ECU diagnostics, fuel injection systems (KE-Jetronic, HFM), ignition systems, emissions control. Transmission: Automatic Transmission (e.g., 722.3, 722.4, 722.6) repair, overhaul, diagnostic procedures. Drivetrain: Front and rear suspension, steering system, driveshafts, differentials. Braking System: ABS, ASR, hydraulic and pneumatic systems, brake pad/rotor replacement, caliper overhaul. Electrical System: Wiring diagrams, component testing, lighting, starter, alternator, battery systems, comfort electronics. HVAC System: Climate control system operation, diagnosis, refrigerant handling, component replacement. Body And Interior: Panel replacement, door mechanisms, glass, seat adjustments, trim removal. Comfort Features: Power seats, windows, mirrors, sunroof, door locks, central locking. Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks and top-offs, spark plug replacement. Troubleshooting: Diagnostic flowcharts, symptom-based troubleshooting for various systems. Component Replacement: Step-by-step guides for replacing virtually all mechanical and electrical components. Engine Rebuild: Detailed instructions for complete engine disassembly, inspection, and reassembly. Transmission Overhaul: Comprehensive procedures for automatic transmission disassembly, repair, and reassembly. Electrical Diagnostics: Testing of circuits, sensors, actuators, and control modules with wiring diagrams. Bodywork Repair: Dent repair, panel alignment, rust prevention and repair techniques. Technical Depth Depth Level: Comprehensive, covering all aspects from basic maintenance to complete engine and transmission rebuilds, including advanced electrical diagnostics. 📊 Manual Specifications File Format Compatibility: All PC & MAC Computers, Tablets, Smartphones (requires Adobe Reader). Searchability: Likely searchable if text-based PDF, enabling quick access to information. Printability: Printable by the page, chapter, or entire document. Print Quality Image Clarity: High quality, described as 'easy to follow step-by-step instructions & pictures'. Binding Type Digital Format: N/A (Downloadable) Paper Type Digital Format: N/A (Downloadable) ⚙️ Engine Specifications Primary Engine V8 Engine Code V8: M119 Displacement V8: 4.2L (4196 cc) and 5.0L (4973 cc) Configuration V8: 4.2L: V8, 32 valves (4 valves per cylinder), DOHC. 5.0L: V8, 32 valves, DOHC. Performance 420Sel: Approx. 275-280 hp @ 5700-5800 rpm, 295-315 lb-ft @ 3800-4000 rpm. Performance 500Sel: Approx. 322-326 hp @ 5500-5600 rpm, 354-359 lb-ft @ 3900-4000 rpm. Primary Engine V12 Engine Code V12: M120 Displacement V12: 6.0L (5987 cc) Configuration V12: V12, 48 valves (4 valves per cylinder), DOHC. Performance 600Sel: Approx. 402 hp @ 5200 rpm, 428 lb-ft @ 3800 rpm. Fuel System Injection Type: Electronic Fuel Injection (Bosch HFM, earlier models may use KE-Jetronic). Fuel Type Recommended Fuel: Premium Unleaded Gasoline (91+ Octane) 🔧 Transmission Standard Transmission Type: 4-speed Automatic (722.3, 722.4) on earlier V8 models, 5-speed Automatic (722.6 '5G-Tronic') introduced later, standard on V12 models and later V8s. Optional Transmission Type: N/A (Typically automatic only for this model range). Features Gear Selection: Standard P-R-N-D-3-2 or P-R-N-D-4-3 with electronic controls. Fluid Specifications Automatic Transmission Fluid: MB 236.6 (e.g., Shell ATF 3403 M-115, Mobil ATF 220/3309, Pentosin ATF1). 📐 Dimensions Exterior Sedan Length: Approx. 5113 mm (201.3 in) for standard wheelbase, 5213 mm (205.2 in) for long wheelbase (SEL). Width: Approx. 1886 mm (74.3 in) Height: Approx. 1487 mm (58.5 in) Exterior Coupe Length: Approx. 4960 mm (195.3 in) Width: Approx. 1855 mm (73.0 in) Height: Approx. 1387 mm (54.6 in) Weights Curb Weight Typical: Approx. 1900-2200 kg (4189-4850 lbs) depending on engine and wheelbase. 🛡️ Safety Features Ratings NHTSA Ratings: Not independently rated by NHTSA in the modern sense, but built to high safety standards of the era. Active Features Traction Control: ASR (Anti-Slip Regulation) available on most models. Braking Assistance: ABS (Anti-lock Braking System) standard. Passive Features Airbags: Driver and front passenger airbags standard by mid-production; side airbags may have been optional or standard on later models. Body Construction: Reinforced safety cage, energy-absorbing crumple zones. Seat Belts: Pretensioner seat belts for front occupants. 💡 Technology Features Infotainment Audio System: High-quality sound systems, often from Becker or Bose, with CD changers available. Navigation: Optional GPS navigation system (early generation). Driver Assistance Cruise Control: Standard cruise control. Parking Assistance: Optional Parktronic parking sensors (introduced later in the W140 lifecycle). Connectivity Communication Systems: Pre-wiring for early cellular telephones. Comfort Features Climate Control: Dual-zone automatic climate control, later models featured advanced...