🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 280S Product Name: Mercedes-benz W123 280S 1976-1985 Factory Repair Manual Download PDF Generation Generation Identifier: W123 👋 Introduction Market Position Target Audience: Owners of Mercedes-Benz W123 280S models from 1976-1985 who wish to perform maintenance and repairs themselves, saving on labor costs. Competitive Analysis Manual Authenticity: Actual Genuine Factory Repair Manuals, not third-party publications, ensuring accuracy and completeness. Key Features Benefit Labor Savings: $50 - $60 per hour savings on shop labor costs by enabling DIY servicing. Instructional Method: Step-by-step instructions, detailed illustrations, diagrams, photos, notes, cautions, and warnings to guide users through procedures. Search Functionality: Searchable PDF format allows for quick location of specific information. Digital Convenience: Downloadable PDF eliminates the need for shipping and waiting for physical copies, offering instant access. 📋 Manual Details Coverage Areas Covered Model Years: 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985 Covered Trim Levels: 280S (All Styles Covered) Page Count Estimated Page Count: Hundreds (exact count not specified, but described as 'hundreds of pages') Manual Type Manual Type: Factory Service Repair Manual Language Language: English Format File Format: PDF (Downloadable) 📖 Manual Coverage Systems Covered Engine Service Repair: Detailed procedures for engine maintenance, repair, and overhaul. Transmission Service Repair: Comprehensive coverage of automatic and manual transmission maintenance and repair. Brake System: Inspection, maintenance, and repair of the hydraulic brake system. Wiring Diagram: Detailed electrical wiring diagrams for all vehicle systems. Electrical System: Troubleshooting and repair of all electrical components and circuits. Suspension: Repair and maintenance of front and rear suspension systems. Periodic Lubrication: Guidelines and specifications for lubrication points and intervals. Steering: Service and repair of the steering system, including power steering. Cooling System: Maintenance and repair of the radiator, thermostat, water pump, and hoses. Fuel Injection Fuel System: Detailed information on the fuel delivery and injection system. Emission System: Information related to emission control systems and their maintenance. Heater Air Conditional: Service and repair of the climate control system. Engine Control System: Diagnostics and repair of engine management systems. Chassis Body: Body repair, chassis maintenance, and structural information. Restraint System: Information on seat belts and other restraint components. Interior: Details on interior trim, upholstery, and components. Differential Drive: Maintenance and repair of the rear axle and differential. Axle: Service procedures for front and rear axles. Procedures Included General Maintenance: Routine service and preventative maintenance procedures. Troubleshooting: Diagnostic guides and common problem solutions. Repair Procedures: Step-by-step instructions for all repair operations. Rebuild Refurbish Restore: Comprehensive guidance for major overhauls and restorations. Diagnostics: Advanced diagnostic techniques for identifying faults. Tuning: Information on engine tuning and performance adjustments. Technical Depth Depth Of Coverage: Complete official factory level detail, covering everything from basic maintenance to full rebuilds and diagnostics. Mimics information available to factory-trained technicians. 📊 Manual Specifications File Format File Format Details: PDF, downloadable. Compatible with all PC-based Windows operating systems and Mac. Can be saved to hard drive or burned to CD-ROM. Print Quality Printability: Fully printable without restriction. Users can print individual pages, chapters, or the entire manual. Binding Type Binding Type: N/A (Digital Download - Printable) Paper Type Paper Type: N/A (Digital Download - Printable) Software Requirements Required Software: Adobe PDF Reader Delivery Method Delivery: Download link provided on checkout page after payment. ⚙️ Engine Specifications Primary Engine Engine Model: M110 (inline-6 cylinder) Engine Displacement: 2.8 Liters (2785 cc) Engine Configuration: Inline 6-Cylinder, SOHC Performance Horsepower Approx: 140-155 hp (depending on market and specific year/tuning) Torque Approx: 165-175 lb-ft (depending on market and specific year/tuning) Fuel System Fuel Delivery: Bosch K-Jetronic (CIS) Fuel Injection Fuel Type: Unleaded Gasoline (Octane rating as per Mercedes-Benz specification) 🔧 Transmission Standard Transmission Type Std: 4-Speed Manual Transmission (often standard on base models) Optional Transmission Type Opt: 4-Speed Automatic Transmission (often common on 280S models) Features Transmission Fluid Type: Typically MB-spec ATF (e.g., Dexron II or equivalent specified in manual) 📐 Dimensions Exterior Body Styles: Saloon (Sedan), Estate (Station Wagon), Coupe, Long-wheelbase Saloon Weights Curb Weight Approx: 1500-1700 kg (depending on body style and equipment) 🛡️ Safety Features Ratings Safety Era Context: While specific modern crash ratings are not available for this era, the W123 was known for its robust construction and safety features for its time. Active Features Braking System: Four-wheel disc brakes (front ventilated) with servo assistance, typically ABS optional/later models. Passive Features Chassis Construction: Reinforced safety cage, crumple zones, safety steering column. Seat Belts: Front 3-point inertia reel seat belts, rear lap and diagonal belts. 💡 Technology Features Infotainment Infotainment System: Basic: AM/FM Radio, Cassette Player. Optional: Air Conditioning (manual or optional climate control). Driver Assistance ABS: Anti-lock Braking System (ABS) was an optional feature, particularly on later models. Connectivity Connectivity Features: None (vehicles of this era predate modern connectivity features like Bluetooth or USB). 🔧 Maintenance Service Intervals Oil Change Interval: Typically...