🏷️ Basic Information Identification Make: Mercedes-Benz Model: 280S Chassis Code: W116 Production Years Covered: 1975-1976 Codes Engine Code: M110 (Inline-6, DOHC) 👋 Introduction Market Position Vehicle Class: Luxury Sedan Brand Perception: Reputation for quality, engineering, and durability. Competitive Analysis Competitors: BMW 7 Series (E23), Jaguar XJ, Rolls-Royce Silver Shadow, Cadillac Eldorado. Key Features Distinguishing Factors: Robust build quality, sophisticated engineering, comfortable ride, advanced features for its time. Manual Purpose Target Audience: DIY enthusiasts, independent repair shops, and Mercedes-Benz dealerships. Manual Value Benefits: Enables accurate diagnostics, proper repairs, and effective maintenance, preserving vehicle value and performance. 📋 Manual Details Coverage Areas Primary Focus: Factory Service Workshop Scope: Comprehensive repair and maintenance Page Count Estimated Pages: Extensive (specific count not provided, but implies thoroughness) Manual Type Type: Factory Service Workshop Manual Language Language: English (presumed, typical for factory manuals of this era for international markets) Format Format: HTML/Flash Menu with PDF files Compatibility: Windows 95/98/ME/XP/Vista/Win7, Linux, MAC 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, diagnosis, tuning, fuel system, ignition system, lubrication, cooling Brakes: Hydraulic system, calipers, master cylinder, parking brake, ABS (if equipped, though likely not standard for this specific model year/variant, but manual may cover general principles) Suspension: Front and rear suspension components, shock absorbers, springs, control arms, steering linkage Drivetrain: Transmission (automatic/manual), differential, driveshafts, axles Electrical: Wiring diagrams, starter, alternator, battery, lighting, instruments, power windows, central locking Bodywork: Exterior trim, doors, hood, trunk, bumpers, body panel repair, glass replacement Interior: Seats, dashboard, trim panels, climate control, heating, ventilation Procedures Included Maintenance: Oil changes, filter replacements, fluid checks and changes, tune-ups, belt inspections Repair: Component removal and installation, rebuilding of major systems (e.g., transmission, engine components) Diagnostics: Troubleshooting guides, symptom-based diagnosis, diagnostic flowcharts Technical Depth Level: Professional/Dealer level, covering everything from basic maintenance to complete system rebuilds 📊 Manual Specifications File Format Digital Format: HTML/Flash Menu with embedded PDF documents Searchability: PDF files are typically searchable if the original source was text-based. Print Quality Digital Quality: High-resolution, suitable for printing individual pages or sections. Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-Cylinder, SOHC Displacement: 2.8 Liters (2778 cc) Bore X Stroke: 86.0 mm x 80.0 mm Performance Horsepower: Approx. 180-185 PS (DIN) / 177-183 hp (SAE net) at 5800 RPM (Varies slightly by market and specific engine tune) Torque: Approx. 245-250 Nm (181-184 lb-ft) at 4200 RPM Fuel System Fuel Delivery: Bosch K-Jetronic Fuel Injection (Mechanical) Fuel Type: Unleaded Gasoline (Octane rating as per Mercedes-Benz specification for the era, likely 95 RON or higher) Ignition System Ignition Type: Breakerless electronic ignition Cooling System Cooling Medium: Water-cooled 🔧 Transmission Standard Transmission Type 1975: 4-speed Manual (M115 chassis typically had manual standard, but W116 280S often came with automatic) Optional Transmission Type Optional: 3-speed Automatic (722.1 series) Features Automatic Features: Torque converter, hydraulic control, typically with selective gear positions (P-R-N-D-2-1) Fluid Specifications Automatic Transmission Fluid: MB 236.1 specification ATF (e.g., Dexron II or equivalent as per manual) Fluid Capacities Automatic Transmission Capacity: Approx. 8-10 liters (depending on torque converter fill) 📐 Dimensions Exterior Length: Approx. 4995 mm (196.7 in) Width: Approx. 1800 mm (70.9 in) Height: Approx. 1420 mm (55.9 in) Wheelbase: Approx. 2900 mm (114.2 in) Weights Curb Weight: Approx. 1550-1650 kg (3417-3638 lbs) depending on options Gross Vehicle Weight Rating: Approx. 2100-2200 kg Towing Capacity: Not specified as standard; generally not recommended for significant towing for luxury sedans of this era. 🛡️ Safety Features Ratings Crash Test Data: No standardized crash test ratings like modern vehicles; relied on robust construction and passive safety features. Active Features Braking System: Hydraulically assisted disc brakes front and rear. ABS was not standard on 280S in these years, but might be present on rare export variants. Steering: Recirculating ball steering, power assisted. Passive Features Seatbelts: 3-point inertia reel seatbelts at front, lap belts at rear. Structure: Integrated safety cell, crumple zones, reinforced pillars. Lighting: Halogen headlamps for improved night visibility. 💡 Technology Features Infotainment Audio System: Factory fitted AM/FM radio with optional cassette player, speakers typically front and rear. Climate Control: Manual ventilation and heating system, optional air conditioning (often dealer-installed or specific market). Driver Assistance Cruise Control: Optional mechanical cruise control system. Parking Assistance: None (rely on driver skill and mirrors). Connectivity Connectivity Features: N/A (No modern connectivity features like Bluetooth or USB). 🔧 Maintenance Service Intervals Oil Change Interval: Typically 7,500-10,000 miles or 12-15,000 km (subject to manual recommendation and oil type) Transmission Fluid Change: Every 30,000-50,000 miles or as specified for automatic transmission. Major Service Interval: Indicative major services at 30k, 60k, 90k miles including spark plugs, fuel filter, air filter. Fluid Specifications Engine Oil Type: SAE 10W-40 or 15W-40 API SF/CD (or equivalent for the era), capacity approx. 6.5-7.5 liters. Coolant Type: Ethylene glycol-based antifreeze with...