🏷️ Basic Information Identification Make: Mercedes-Benz Model: S-Class Chassis Code: V140 Model Designation: S-Class (W140 chassis, V140 specifically refers to the long-wheelbase variant) Generation Generation Code: W140 Generation Years: 1991-1998 Codes Production Years Covered By Manual: 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999 👋 Introduction Market Position Vehicle Segment: Full-size luxury sedan Target Audience: Affluent individuals seeking executive transportation and advanced engineering Competitive Analysis Key Competitors: BMW 7 Series (E32/E38), Lexus LS 400, Jaguar XJ, Rolls-Royce Silver Spirit, Bentley Eight Key Features Defining Characteristics: Massive interior space, advanced (for its time) technology, refined ride quality, powerful engine options, substantial build quality Manual Advantage: Empowers owners and independent mechanics with the detailed knowledge to maintain and repair this complex luxury vehicle, saving significant dealership costs. 📋 Manual Details Coverage Areas Manual Scope: Complete Workshop Service Repair Model Variants Covered: All Models/Engines/Trim/Transmissions Types Page Count Estimated Page Count: Extensive (typically 2000+ pages for comprehensive manuals of this era) Manual Type Manual Classification: Workshop Service Repair Manual Language Language: English Format Delivery Format: Downloadable Digital File File Accessibility: Printable, Tablet/Smartphone Compatible 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical (M104, M119, M120, OM603, OM606), fuel injection (KE-Jetronic, HFM), ignition, cooling, lubrication, exhaust, emissions control, engine management (ME, LH) Transmission Systems: Automatic Transmission (722.3, 722.4, 722.6), manual transmission (less common), transfer case (4MATIC models) Drivetrain Systems: Drive shafts, differentials, axles, 4MATIC all-wheel drive system Suspension Systems: Front and rear suspension, shock absorbers, springs, control arms, power steering system Brake Systems: Hydraulic brake system, ABS (Anti-lock Braking System), ASR (Acceleration Skid Control), brake pads, rotors, calipers, lines, parking brake Electrical Systems: 12V electrical system, battery, alternator, starter, lighting, wiring diagrams, fuses, relays, control modules (ECU, TCU, ABS control, etc.) Body And Chassis: Body structure, doors, hood, trunk, bumpers, glass, chassis components, corrosion protection Interior Systems: Seating, climate control (manual/automatic), HVAC components, dashboard, trim panels, seat belts, airbags Comfort And Convenience: Power windows, power locks, power mirrors, central locking, cruise control, seat adjustment, sunroof operation Safety Systems Safety Features: Airbag system (SRS), seat belt pre-tensioners, ABS, ASR Procedures Included Maintenance Procedures: Scheduled maintenance (oil changes, filter replacements, inspections), fluid level checks and top-offs, lubrication points Diagnostic Procedures: Troubleshooting guides, symptom-based diagnostics, fault code interpretation (OBD-I and early OBD-II if applicable), component testing Repair Procedures: Step-by-step instructions for engine repair, transmission overhaul, brake system service, suspension replacement, electrical component repair, body panel repair Overhaul Procedures: Detailed instructions for engine rebuilds, transmission rebuilds, differential rebuilds Installation Procedures: Installation of new components, accessories, and replacement parts Technical Specifications: Torque specifications, clearances, adjustments, fluid capacities, electrical schematics Technical Depth Depth Of Coverage: Comprehensive from basic maintenance to complete engine and transmission rebuilds, including electrical diagnostics and bodywork. 📊 Manual Specifications File Format Primary File Type: PDF (Portable Document Format) Searchability: Likely searchable text, allowing for quick keyword-based information retrieval Print Quality Printability: High quality, designed for clear printing of text and diagrams Binding Type Binding For Printed Version: Not applicable for digital download; would typically be spiral-bound or comb-bound if printed Paper Type Paper Type For Printed Version: Not applicable for digital download; typically printed on durable, matte paper suitable for workshop environments ⚙️ Engine Specifications Primary Engine Engine Options Covered: M104 (3.2L, 3.6L AMG), M119 (4.2L, 5.0L, 6.0L AMG), M120 (6.0L V12), OM603 (3.0L Turbo Diesel), OM606 (3.0L Turbo Diesel) Performance Typical Horsepower Range: 210 hp (OM603) to 408 hp (M120) Typical Torque Range: 345 Nm (OM603) to 580 Nm (M120) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) - Bosch KE-Jetronic, HFM (Hot Film Air Mass), LH-Jetronic Fuel Type: Unleaded gasoline (premium), Diesel fuel Engine Management Dme ECU Types: Various Bosch Motronic and Siemens engine control units depending on engine and year 🔧 Transmission Standard Standard Transmission: 4-speed automatic (722.3/722.4) for most models; 5-speed automatic (722.6 '5G-Tronic') introduced later Optional Optional Transmission: 5-speed manual (rare on V140 models); 4MATIC all-wheel drive system with automatic transmission Features Automatic Transmission Features: Electronic control, multiple shift programs (e.g., Comfort/Sport), Lock-up torque converter Fluid Specifications Automatic Transmission Fluid Type: MB 236.1 (ATF Dexron II-E for 722.3/722.4), MB 236.14 (for 722.6 '5G-Tronic') 📐 Dimensions Exterior Length V140 Standard: 5163 mm (203.3 in) Length V140 Long Wheelbase: 5293 mm (208.4 in) Wheelbase V140 Standard: 3040 mm (119.7 in) Wheelbase V140 Long Wheelbase: 3170 mm (124.8 in) Interior Interior Space Description: Expansive cabin offering exceptional rear-seat legroom, especially in the long-wheelbase V140 variant. Cargo Trunk Capacity: Approximately 500 liters (17.6 cu ft), subject to model variation and spare tire placement. Weights Curb Weight Range: 1900 kg to 2200 kg (4189 lbs to 4850 lbs), depending on engine and equipment. 🛡️ Safety Features Ratings Crash Test Ratings: Not tested by modern agencies like NHTSA/Euro NCAP. Designed to high German safety standards of the era. Active Features Active Safety Systems: ABS (Anti-lock Braking System),...
Empowers owners and independent mechanics with the detailed knowledge to maintain and repair this complex luxury vehicle, saving significant dealership costs.
📋 Manual Details
Coverage Areas
Manual Scope:
Complete Workshop Service Repair
Model Variants Covered:
All Models/Engines/Trim/Transmissions Types
Page Count
Estimated Page Count:
Extensive (typically 2000+ pages for comprehensive manuals of this era)
Expansive cabin offering exceptional rear-seat legroom, especially in the long-wheelbase V140 variant.
Cargo
Trunk Capacity:
Approximately 500 liters (17.6 cu ft), subject to model variation and spare tire placement.
Weights
Curb Weight Range:
1900 kg to 2200 kg (4189 lbs to 4850 lbs), depending on engine and equipment.
🛡️ Safety Features
Ratings
Crash Test Ratings:
Not tested by modern agencies like NHTSA/Euro NCAP. Designed to high German safety standards of the era.
Active Features
Active Safety Systems:
ABS (Anti-lock Braking System), ASR (Acceleration Skid Control), optional ESP (Electronic Stability Program) on later models, Brake Assist
Passive Features
Passive Safety Features:
Driver and front passenger airbags, side-impact protection (in doors), reinforced body structure, three-point seat belts with pre-tensioners
💡 Technology Features
Infotainment
Infotainment System:
Early COMAND (Cockpit Management and Navigation) system optional on later models, or simpler Becker stereo systems with cassette and CD changer options.
Navigation System:
Optional GPS navigation, typically using bulky CD-ROM based maps.
Limited by era; primarily analog cellular phone integration in some models. No modern smartphone integration or Wi-Fi.
Comfort Features
Advanced Comfort Features:
Dual-zone automatic climate control, heated and ventilated seats, memory seats, automatic climate-controlled rear cabin (on long-wheelbase), soft-close doors, double-glazed windows for acoustic insulation.
🔧 Maintenance
Service Intervals
Oil Change Interval:
Typically every 10,000 - 15,000 km (6,000 - 9,000 miles) or annually, depending on driving conditions and specific engine type.
Major Service Intervals:
Spark plug replacement, coolant flush, transmission fluid service, differential fluid service at intervals like 50,000 - 100,000 km (30,000 - 60,000 miles).
Fluid Specifications
Engine Oil Specification:
MB 229.1, SAE 0W-40, 5W-40, 5W-30, or 10W-40 depending on climate and engine (refer to manual for specifics).
Coolant Specification:
MB 325.0 (Ethylene Glycol based, blue color), typically a 50/50 mix with distilled water.
Brake Fluid Specification:
DOT 4
Known Issues
Common Maintenance Concerns:
Hydraulic systems (suspension, brakes), electronic control units (ECUs), wiring harness degradation (especially insulation breakdown), vacuum system leaks, catalytic converter failure, window regulators, door lock actuators.
Diesel Specific Issues:
Glow plug system, injection pump issues, turbocharger wear on OM603/606.
📚 Vehicle History
Brand Heritage
Mercedes Benz Legacy:
Long-standing reputation for engineering excellence, luxury, and safety in premium automobiles.
Model Evolution
W140 Lineage:
Successor to the W126 S-Class, representing a significant technological leap and a more imposing design language. Precursor to the W220 S-Class.
Design Philosophy:
Emphasis on comfort, quietness, and integrated technology, often seen as a 'rolling fortress'.
Production
Production Period:
1991-1998
Manufacturing Locations:
Sindelfingen, Germany
Sales Volume Context:
A high-volume seller within the luxury segment, but a niche product compared to mass-market vehicles.
🏆 Awards & Recognition
Recognitions
Design Awards:
While not typically winning specific 'awards' in the modern sense, the W140 was recognized for its engineering prowess and contribution to luxury automotive design.
Ratings
Reliability Perception:
Mixed reputation; while mechanically robust, its complex electronics and aging systems can lead to costly repairs if not meticulously maintained.
Certifications
Automotive Journalism Reviews:
Often praised for its smooth ride, powerful engines, and luxurious interior, but sometimes criticized for its size and styling compared to its predecessor.
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