🏷️ Basic Information Identification Make: Mercedes-Benz Model: 280 Generation Chassis Code: W114 & W115 Production Years: 1973-1976 Codes Product Identifier: Mercedes Benz 280 W114 & W115 Series 1973-1976 Service Repair Shop Manual Download 👋 Introduction Market Position Target Audience: DIY enthusiasts and professional mechanics seeking detailed repair information for Mercedes-Benz W114/W115 models. Competitive Analysis Value Proposition: Offers significant cost savings by enabling owners to perform their own maintenance and repairs, avoiding high labor costs. Key Features Ease Of Use: Designed for easy use with step-by-step instructions and visual aids, accessible on various devices. Delivery: Instant download upon payment, no shipping costs or delays. 📋 Manual Details Coverage Areas Scope: All models for the stated years and all engine types. Page Count Estimated Pages: Extensive (detailed technical information implies significant page count, not explicitly stated) Manual Type Type: Service Repair Shop Manual Language Language: English Format Digital Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine overhaul, fuel system, ignition system, exhaust system, cooling system, lubrication system. Drivetrain: Clutch, transmission (manual and automatic where applicable), driveshafts, differential, axles. Chassis And Suspension: Front suspension, rear suspension, steering system, wheel alignment, shock absorbers, springs. Brakes: Brake system diagnosis, hydraulic system, calipers, rotors, pads, parking brake. Electrical: Battery, starting system, charging system, lighting system, instrumentation, wiring diagrams. Bodywork And Interior: Body repair, door mechanisms, glass, upholstery, trim, heating and ventilation. Procedures Included Maintenance: Routine maintenance, fluid changes, filter replacements, lubrication, inspections. Repair: Step-by-step repair procedures for all major components and systems. Diagnostics: Troubleshooting guides and diagnostic procedures for common and uncommon issues. Overhaul: Detailed instructions for complete engine and transmission overhauls. Adjustments: Carburetor adjustments, timing adjustments, brake adjustments, clutch adjustments. Technical Depth Depth: Full professional quality in-depth service and repair. Covers everything from routine maintenance to complete rebuilds. Diagrams: Includes detailed wiring diagrams for all electrical systems. Illustrations: Features step-by-step instructions with pictures to aid understanding. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely searchable text within PDF, enhancing usability. Print Quality Quality: Professional quality digital download, implying clear text and images. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Compatibility Operating Systems: Compatible with all PCs, MACs, Tablets, and Smartphones (Win/MAC/Linux). ⚙️ Engine Specifications Primary Engine Engine Family: Mercedes-Benz M114/M115 inline-six gasoline engines Displacement 280: 2.8 Liters (2778 cc) Bore X Stroke 280: 82.0 mm x 90.0 mm (approximate) Compression Ratio 280: 8.0:1 to 8.7:1 (depending on variant) Performance Horsepower 280: 130-140 hp @ 5000 rpm (approximate, depending on market and variant) Torque 280: 220-235 Nm @ 3000 rpm (approximate, depending on market and variant) Fuel System Carburetion: Typically downdraft twin-choke carburetors (e.g., Solex, Zenith Stromberg) or Bosch fuel injection on some variants. Fuel Type: Unleaded gasoline (or leaded with appropriate precautions for earlier models). Engine Construction Block Material: Cast Iron Cylinder Head Material: Aluminum Alloy Valvetrain: Single Overhead Camshaft (SOHC) 🔧 Transmission Standard Transmission Type: 4-speed manual or 4-speed automatic transmission (e.g., Mercedes-Benz '4G-Tronic'/'722.1' series). Optional Optional Transmission: Automatic transmission was a popular option. Features Clutch Type: Single dry plate (manual transmission). Transmission Fluid Spec: Refer to manual for specific ATF (Automatic Transmission Fluid) type (e.g., Dexron II or equivalent). 📐 Dimensions Exterior Body Styles: 4-door Sedan (W115 chassis), 2-door Coupe (W114 chassis). Wheelbase: 2750 mm (108.3 in) Length: Approx. 4750 mm (187 in) Width: Approx. 1750 mm (68.9 in) Height: Approx. 1450 mm (57.1 in) Weights Curb Weight: Approx. 1400-1550 kg (3086-3417 lbs) depending on body style and equipment. 🛡️ Safety Features Ratings Crash Safety: Designed to early safety standards of the 1970s; no modern crash test ratings apply. Emphasis on sturdy chassis construction. Active Features Braking System: Front disc brakes, rear drum brakes. Power assisted braking standard. Steering: Recirculating ball steering, power steering available as an option. Passive Features Seatbelts: Standard front seat belts, rear seat belts often standard or optional depending on market. Body Construction: Unitized body construction with crumple zones designed for the era. 💡 Technology Features Infotainment Audio System: Factory-installed AM/FM radio, often with an optional cassette player. Basic analog controls. Driver Assistance Assistance Features: No electronic driver assistance systems. Focus on mechanical engineering. Connectivity Connectivity: None 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000-7,500 miles (8,000-12,000 km) or annually, whichever comes first. Refer to manual for precise intervals. Tune Up Interval: Recommended tune-ups (spark plugs, points, filters) every 10,000-20,000 miles (16,000-32,000 km). Transmission Service: Fluid and filter change recommended every 30,000-50,000 miles (48,000-80,000 km). Fluid Specifications Engine Oil Type: SAE 20W-50 or SAE 10W-40 (API SE/SF service classification recommended). Check manual for specific viscosity based on climate. Coolant Type: Ethylene glycol-based coolant (50/50 mix with distilled water). Brake Fluid Type: DOT 3 or DOT 4 hydraulic brake fluid. Known Issues Common Problems: Carburetor issues (tuning, leaks), fuel system degradation (old hoses), cooling system leaks (radiator, hoses), vacuum line...