🏷️ Basic Information Identification Make: Mercedes-Benz Model: 280 Chassis Code: W114 Product Type: Full Service & Repair Manual Model Series: W114 (also known as the 'Stroke Eight') 👋 Introduction Market Position Target Audience: Professional mechanics, technicians, and dedicated DIY enthusiasts Competitive Analysis Value Proposition: Provides factory-level technical information for hands-on maintenance and repair, offering significant cost savings over dealership service. Key Features Completeness: Full factory coverage, not a condensed or partial manual. Detail Level: Step-by-step instructions with high-quality visuals for accurate execution of all procedures. 📋 Manual Details Coverage Areas Years Covered: 1973-1976 Page Count Estimated Pages: Hundreds (specific count not provided, but described as 'very detailed') Manual Type Type: Factory Service Repair Workshop Manual Language Language: English (implied by product description and typical market for such manuals) Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, tuning, diagnostics, fuel injection (Bosch D-Jetronic), ignition, cooling, lubrication Transmission: Manual and automatic transmission overhaul, repair, adjustments, fluid changes, driveshaft and differential Brakes: Hydraulic system, disc brake overhaul (front and rear), drum brake adjustments (rear parking brake), power assist (Bosch servo), fluid specifications Electrical: Wiring diagrams, starter, alternator, battery, lighting system, instrumentation, fuses, relays, power windows, radio systems Suspension Steering: Front independent suspension (double wishbone), rear independent suspension (semi-trailing arms), shock absorbers, springs, steering gear overhaul, power steering system Body Chassis: Body panel repair, door mechanisms, window glass replacement, interior trim, underbody protection, jacking points, lifting procedures Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug service, fluid checks and top-ups, lubrication points Troubleshooting: Step-by-step diagnostic procedures for common and uncommon faults across all systems Repair Overhaul: Detailed instructions for disassembling, repairing, and reassembling major components and systems Specifications Data: Torque specifications, clearances, alignment data, electrical resistance values, pressure readings Technical Depth Depth: Comprehensive, covering everything from basic service to full mechanical and electrical component rebuilds Illustrations: Hundreds of detailed photos and exploded diagrams 📊 Manual Specifications File Format Format: PDF Accessibility: Downloadable and usable on multiple devices (computer, tablet, smartphone) Print Quality Printability: Printable (single pages or entire manual) Licensing Usage License: Lifetime usage, no expiry, no renewal fees Software Compatibility: Compatible with all Windows and MAC operating systems ⚙️ Engine Specifications Primary Engine Engine Type: Inline-6 Cylinder, Overhead Camshaft (OHC) Displacement: 2778 cc (2.8 Liters) Bore X Stroke: 82.0 mm x 90.0 mm Compression Ratio: 8.0:1 (typical for this era and engine) Performance Horsepower: 130-140 hp SAE Gross (approximate, depending on market and specific tune) Torque: 230-240 Nm SAE Gross (approximate) Fuel System Fuel Delivery: Bosch D-Jetronic Electronic Fuel Injection (EFI) Fuel Type: Unleaded gasoline (premium unleaded recommended, 95 RON or higher) Ignition System Ignition Type: Breakerless electronic ignition (typically Bosch) 🔧 Transmission Standard Type: 4-speed Manual Transmission Optional Type: 4-speed Automatic Transmission (optional, likely with torque converter) Features Clutch: Single dry plate, hydraulically operated Fluid Specifications Manual Transmission Fluid: GL-4 Gear Oil, SAE 75W/90 or 80W/90 (verify with specific manual) Automatic Transmission Fluid: Dexron III or equivalent (verify with specific manual) 📐 Dimensions Exterior Wheelbase: 2750 mm (108.3 inches) Length: 4700 mm (185.0 inches) Width: 1740 mm (68.5 inches) Height: 1450 mm (57.1 inches) Weights Curb Weight: 1400-1500 kg (approximate, depending on options) Gross Vehicle Weight: 1900 kg (approximate) Towing Capacity: Not specified or typically limited for this model's design 🛡️ Safety Features Passive Features Seatbelts: Standard front seatbelts, optional rear seatbelts Body Construction: Unitized body construction with integrated crumple zones, designed for structural integrity. Steering Column: Collapsible steering column for improved driver protection in frontal impacts. Active Features Brakes: Four-wheel disc brakes (front ventilated) with dual-circuit hydraulic system. Brake Assist: Power assisted braking system (Bosch servo) Ratings Crash Testing: Modern crash test data is not directly comparable to vehicles of this era; however, Mercedes-Benz historically prioritized safety engineering. 💡 Technology Features Infotainment Audio System: Factory original AM/FM radio, often with an optional 8-track player or cassette deck. Driver Assistance Cruise Control: Optional cruise control system available on some models. ABS: Anti-lock Braking System (ABS) was not standard or widely available on W114 models; typically introduced on higher-end Mercedes models later. Connectivity Original Connectivity: No modern connectivity features (Bluetooth, USB, etc.) as standard; aftermarket solutions are common. 🔧 Maintenance Service Intervals Oil Change: Every 5,000-7,500 km or 6-12 months (depending on driving conditions and oil quality) Filter Replacement: Oil filter with every oil change; air filter and fuel filter every 15,000-25,000 km Spark Plugs: Inspect every 10,000 km, replace every 20,000-30,000 km (depending on plug type) Valve Adjustment: Check and adjust every 20,000-30,000 km Fluid Specifications Engine Oil: API SF/CD rated, SAE 20W-50 or 10W-40 (depending on climate). Capacity: approx. 7.5 Liters. Coolant: 50/50 mix of ethylene glycol coolant and distilled water. Capacity: approx. 10-12 Liters. Brake Fluid: DOT 3 or DOT 4 glycol-based brake fluid. Capacity: approx. 1 Liter. Known Issues Rust Corrosion: Prone...