🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 280SE Model Code: W123 Body Style: Sedan (Saloon) Engine Variant: 280SE Generation Generation Designation: First Generation W123 Codes Chassis Code: W123 👋 Introduction Market Position Target Audience: Do-it-yourselfers and experienced mechanics Competitive Analysis Comparison To Print: More inexpensive and convenient than old paper repair manuals Key Features Completeness: COMPLETE official full factory service repair manual Convenience: Digital format, accessible on multiple devices, printable Cost Effectiveness: Inexpensive way to keep vehicle working properly, saves money on mechanic labor 📋 Manual Details Coverage Areas Applicable Years: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 Page Count Estimated Page Count: Hundreds of pages (exact number not specified, but implies comprehensive coverage) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine Service Repair: Included Transmission Service Repair: Included Brake System: Included Wiring Diagram: Included Electrical System: Included Suspension: Included Steering: Included Cooling System: Included Fuel Injection: Included Fuel System: Included Emission System: Included Heater Air Conditioning: Included Engine Control System: Included Chassis Body: Included Restraint System: Included Interior: Included Differential Drive: Included Axle: Included Periodic Lubrication: Included Procedures Included General Maintenance: Included Troubleshooting: Included Complete Disassembly Reassembly: Implied by 'step-by-step instructions based on the complete disassembly of the machine' Technical Depth Depth: Comprehensive (covers general maintenance to detailed repair procedures) Visuals: Hundreds of photos and illustrations 📊 Manual Specifications File Format Compatibility: All Versions of Windows, Mac, Smartphones, Tablets (via web browser or Adobe PDF Reader) Print Quality Printability: Yes (printable pages) Binding Type Binding: Digital (PDF format, no physical binding) Paper Type Paper Type: N/A (Digital format) Other Software Requirements: Adobe PDF Reader, Winzip (free online) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-Cylinder Petrol Engine Code Example: M110 (likely, for 2.8L fuel-injected models) Performance Displacement Liters: 2.8 Displacement Cubic Inches: 170.6 Bore X Stroke Mm Approx: 86.0 x 80.25 (typical for M110) Compression Ratio Approx: 8.2:1 to 8.7:1 (depending on sub-model/year) Horsepower Approx Ps: 185 PS (approx. 182 hp) at 5800 rpm (for fuel-injected models) Torque Approx Nm: 240 Nm (approx. 177 lb-ft) at 4200 rpm (for fuel-injected models) Fuel System Fuel Delivery: Bosch K-Jetronic Fuel Injection Fuel Type: Unleaded Gasoline (Octane rating may vary by region and year) 🔧 Transmission Standard Type: 4-speed Manual Transmission (common for earlier models) Optional Type: 4-speed Automatic Transmission (e.g., 4G-Tronic) Features Transmission Fluid Type: Dexron III or equivalent (check specific manual for exact specification) 📐 Dimensions Exterior Length Mm Approx: 4725 Width Mm Approx: 1790 Height Mm Approx: 1430 Wheelbase Mm Approx: 2795 Weights Curb Weight Kg Approx: 1450 - 1550 (depending on options) Gross Vehicle Weight Rating Kg Approx: 1950 🛡️ Safety Features Ratings Crash Safety Design: W123 chassis was known for its robust safety cell and crumple zones, pioneering many safety features of its era. Active Features Brakes: Power-assisted disc brakes front, drum brakes rear (ABS was optional/later in production) Passive Features Seatbelts: Three-point inertia-reel seatbelts (front), lap belts (rear) Steering Column: Collapsible steering column 💡 Technology Features Infotainment Radio Type: Factory-installed AM/FM radio, often with cassette player in later years. Aftermarket units common. Driver Assistance Cruise Control: Optional on many models Connectivity Connectivity Features: Limited by era; primarily focused on power windows, central locking (optional), and climate control. 🔧 Maintenance Service Intervals Oil Change Interval Approx: Every 7,500 - 10,000 miles or annually (refer to specific manual for exact recommendation) Filter Replacement Interval Approx: Engine oil filter with every oil change; Air filter and fuel filter every 15,000 - 30,000 miles. Spark Plug Replacement Interval Approx: Every 30,000 miles Fluid Specifications Engine Oil Type: API SG/SH or higher, SAE 10W-40 or 15W-40 (consult manual for specific viscosity based on climate) Coolant Type: Ethylene Glycol based antifreeze, mixed with distilled water (50/50 ratio) Brake Fluid Type: DOT 3 or DOT 4 Known Issues Common Problems: Rust (especially around wheel arches, door bottoms, and sunroof), fuel distributor issues (K-Jetronic), vacuum leaks, aging rubber components (hoses, mounts), climate control system issues (older models). 📚 Vehicle History Brand Heritage Brand Legacy: Mercedes-Benz is renowned for engineering excellence, durability, and luxury. Model Evolution W123 Introduction: The W123 series was introduced in 1976, succeeding the W114/W115 series. W123 Reputation: The W123 gained a reputation for exceptional build quality, reliability, and longevity, often referred to as one of the most over-engineered cars of its era. Production Production Period: 1976–1985 Manufacturing Plant Example: Bremen, Germany 🏆 Awards & Recognition Recognitions Industry Accolades: The W123 was widely praised by automotive journalists and owners for its build quality and longevity, often cited as a benchmark for durable luxury sedans of the late 20th century.