🏷️ Basic Information Identification Make: Mercedes-Benz Model: S350 Year: 1995 Generation Chassis Code: W140 Codes Engine Code Primary: M104.990 👋 Introduction Market Position Segment: Full-size Luxury Sedan Competitive Analysis Key Competitors 1995: BMW 7 Series (E38), Lexus LS 400 (XF20), Audi A8 (D2), Jaguar XJ (XJ40) Key Features Vehicle Positioning: The W140 S-Class represented the pinnacle of Mercedes-Benz engineering and luxury in its era, known for its robust build quality, advanced technology, and exceptional ride comfort. Manual Value Proposition: Provides owners and technicians with the authoritative information needed to maintain and repair this complex luxury vehicle, ensuring longevity and optimal performance. 📋 Manual Details Coverage Areas Manual Type: Service and Repair Manual Language: English Format: Digital (PDF likely, based on description) Page Count Estimated Page Count: Comprehensive, likely over 1000 pages (typical for this era's Mercedes service manuals) 📖 Manual Coverage Systems Covered Engine Mechanics: Engine disassembly, assembly, overhaul, timing, lubrication, cooling systems Fuel System: Fuel injection (Bosch LH-Jetronic), fuel pump, injectors, pressure regulator Ignition System: Ignition control module, coil packs, spark plugs, wiring Transmission Automatic: 722.6xx (5-speed automatic) - diagnostics, fluid changes, overhaul procedures Drivetrain: Driveshafts, differentials, axles, CV joints Suspension: Front and rear suspension components, shock absorbers, springs, control arms, bushings Steering: Power steering system, steering gear, linkages, troubleshooting Brakes: Hydraulic system, ABS (Anti-lock Braking System), brake pads, rotors, calipers, lines, bleeding procedures Electrical System: Battery, alternator, starter, lighting, fuses, relays, wiring diagrams Climate Control: HVAC system, A/C compressor, evaporator, condenser, blower motor, climate control module Body: Body panels, doors, latches, windows, sunroof, exterior trim Interior: Seats, dashboard, trim panels, interior lighting, sound insulation Diagnostics: Troubleshooting charts, diagnostic trouble codes (DTCs) for various ECUs Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and flushes, spark plug replacement, belt inspection/replacement Repair: Component removal and installation, sub-assembly repair, full rebuild procedures Troubleshooting: System-specific diagnostic trees, common fault identification and correction Adjustments: Valve adjustments (if applicable to M104), idle speed adjustments, alignment procedures Technical Depth Depth Level: Comprehensive, from basic maintenance to full engine and transmission rebuilds, including electrical system diagnostics and wiring diagrams. 📊 Manual Specifications File Format Digital Format: Likely PDF, optimized for searchability and printing. Print Quality Output Quality: High resolution for clear text and diagrams. Binding Type Physical Format If Applicable: N/A (Digital) Paper Type Digital Features: Searchable text, bookmark functionality, clickable links for navigation. ⚙️ Engine Specifications Primary Engine Engine Type: 3.5L Inline-6 Cylinder Engine Code: M104.990 Displacement: 3495 cc (3.5 Liters) Bore X Stroke: 92.0 mm x 86.6 mm Compression Ratio: 10.0:1 Performance Horsepower: 247 hp @ 5500 rpm (approx.) Torque: 340 Nm (251 lb-ft) @ 3750 rpm (approx.) Fuel System Fuel Delivery: Bosch LH-Jetronic Electronic Fuel Injection (EFI) Fuel Type: Unleaded Premium Gasoline (91+ Octane) Emission Control: Three-way catalytic converter, secondary air injection (model dependent) 🔧 Transmission Standard Transmission Type: 5-Speed Automatic Transmission Model: 722.6xx (e.g., 722.603) Optional Optional Transmission: N/A for S350 in this year, 4-speed automatic was common on earlier models or lower trims. Features Transmission Features: Electronic control, multiple shift modes (e.g., Comfort/Sport), torque converter lock-up. 📐 Dimensions Exterior Wheelbase: 3,135 mm (123.4 inches) Length: 5,163 mm (203.3 inches) Width: 1,886 mm (74.3 inches) Height: 1,487 mm (58.5 inches) Weights Curb Weight: Approx. 1,960 kg (4,321 lbs) 🛡️ Safety Features Ratings NHTSA Rating: Not typically rated by NHTSA in the same way as modern vehicles; manufacturer's internal safety standards were very high. Active Features ABS: Standard (Bosch 2.0 ABS System) Traction Control: ASR (Acceleration Slip Regulation) standard. Passive Features Airbags: Driver and front passenger airbags, side airbags (optional on some models). Seatbelts: Pretensioning seatbelts, load limiters. Body Construction: High-strength steel safety cell, crumple zones. 💡 Technology Features Infotainment Audio System: Original Becker or Bose premium sound systems, cassette or CD player. Navigation: Optional factory navigation system (often DVD-based on later models). Driver Assistance Cruise Control: Standard cruise control with electronic throttle control. Parking Sensors: Optional PARKTRONIC parking assist system. Connectivity Phone Integration: Early integrated cellular phone systems (often analog). Other Tech Automatic Climate Control: Dual-zone automatic climate control (THERMOTRONIC). Rain Sensing Wipers: Optional rain-sensing wiper system. Power Seats: Multi-way power adjustable front seats with memory function. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 7,500 - 10,000 miles (12,000 - 16,000 km) or annually, depending on driving conditions and oil type. Refer to manual for specific 'Service A/B' intervals. Transmission Fluid Change: Recommended every 40,000 - 60,000 miles (64,000 - 96,000 km). Use only MB-approved fluid (e.g., ATF 3403-M115). Coolant Flush: Typically every 2-3 years or 30,000-50,000 miles. Use MB-approved coolant concentrate. Fluid Specifications Engine Oil Specification: API SJ or higher, SAE 0W-40 or 5W-40 synthetic recommended. Consult manual for exact MB approval (e.g., MB 229.1, 229.3). Coolant Specification: Mercedes-Benz Approved Antifreeze/Coolant (e.g., G05 based). Brake Fluid Specification: DOT 3 or DOT 4. Power Steering Fluid: Mercedes-Benz Power Steering...