🏷️ Basic Information Identification Make: Mercedes-Benz Model: 280 E Year: 1981 Codes Chassis Code: W123 Engine Code Prefix: M110 Generation Generation Name: W123 Sedan/Saloon Generation Years: 1976-1985 👋 Introduction Market Position Vehicle Segment: Executive Mid-size Sedan. The W123 chassis was renowned for its build quality, durability, and engineering excellence, positioning it as a premium offering in its class. Competitive Analysis Key Competitors: BMW 5 Series (E28), Audi 100, Volvo 240, Jaguar XJ. Key Features Vehicle Attributes: Exceptional build quality, robust engineering, comfortable ride, durable powertrain, sophisticated styling, reputation for longevity and reliability. Manual Value Proposition Target Audience: Owners seeking to maintain and repair their classic Mercedes-Benz, independent mechanics, restoration specialists. 📋 Manual Details Coverage Areas Primary Coverage: Mechanical and electrical systems, maintenance, repair, troubleshooting, bodywork. Specific Systems: Engine, fuel system, ignition, cooling, exhaust, transmission (manual & automatic), driveline, suspension, steering, brakes, electrical system, body, climate control. Page Count Estimated Pages: High volume, detailed (typical for factory service manuals, often 1000+ pages when compiled). Manual Type Type: Service and Repair Manual Language Language: English Format File Format: PDF / WINRAR 📖 Manual Coverage Systems Covered Engine Mechanics: Detailed inspection, disassembly, rebuilding, and assembly of engine components. Includes valve clearance adjustment, injection timing checks and adjustments, spark plug service, and engine mount retorquing. Fuel System: Inspection and replacement of fuel filters (primary and secondary), checking injection system condition. Cooling System: Checking coolant level and antifreeze protection, cooling and heating system checks, coolant replacement. Ignition System: Spark plug inspection and replacement. Transmission Manual: Manual transmission oil change, checking and correcting oil level, clutch disk wear inspection. Transmission Automatic: Automatic transmission fluid and filter change, checking and correcting fluid level. Driveline: Transfer case fluid change and level checks, front axle and rear axle oil changes and level checks, drive shaft flexible coupling inspection. Suspension Steering: Suspension and body structure inspection, inspecting self-leveling suspension, checking ball joints (with special tool), steering play checks, retightening steering bolts, level control system fluid level checks (ADS, ASD, 4MATIC). Brakes: Brake fluid level checks, brake line inspection, brake pad and disk thickness checks, brake disk cleaning, parking brake adjustment and testing, brake fluid replacement. Electrical System: Battery fluid level checks, warning and indicator lamp checks, headlamp and exterior lamp inspection. Bodywork: Water leakage and corrosion inspection, lubricating door hinges and locks, sunroof cleaning and lubrication, soft top checking, windshield wiper and washer inspection, cleaning water drains, removing/installing underbody panels, checking for paint damage. Climate Control: Checking and correcting AC refrigerant charge, replacing dust filters, replacing active charcoal filters, replacing recirculating air filters. Procedures Included Routine Maintenance: Oil and filter changes, air filter replacement, V-belt inspection and tensioning, spark plug replacement, fluid level checks and top-ups, lubrication points. Troubleshooting: Diagnosing vehicle problems, component condition inspection, line and hose inspection. Component Rebuilding: Disassembly, inspection, and reassembly of various vehicle components. Adjustments: Valve clearance, idle speed, injection timing, parking brake, engine stop. Wheel Tire Service: Wheel inspection and rotation, tire inspection and pressure correction, wheel bolt tightening. Technical Depth Depth: Comprehensive, covering detailed diagnostic procedures, component overhaul, and repair specifications. Suitable for professional mechanics and advanced DIY enthusiasts. 📊 Manual Specifications File Format Digital Formats: PDF, WINRAR. Compatible with Windows (95 through 10), Linux, MAC OS, iOS, and Android devices. Print Quality Digital Quality: High-resolution scans or digital creation, ensuring legibility of text and diagrams. Searchable text is a common feature of well-produced PDF manuals. Binding Type Digital Delivery: Instant Download Paper Type Physical Format ABSence: Not applicable as delivered digitally. Original manuals were typically printed on durable paper suitable for workshop environments. ⚙️ Engine Specifications Primary Engine Engine Type: Inline 6-Cylinder, SOHC (Single Overhead Camshaft) Engine Code: M110.984 (for 2.8L) Performance Displacement: 2746 cc (2.8 Liters) Bore X Stroke: 86.0 mm x 78.0 mm Compression Ratio: 8.2:1 or 9.0:1 (depending on market/spec) Horsepower: Approx. 138-145 hp (DIN) at 5000 rpm Torque: Approx. 225-230 Nm (166-170 lb-ft) at 3000 rpm Fuel System Fuel Delivery: Bosch K-Jetronic (CIS - Continuous Injection System) Fuel Injection Fuel Type: Unleaded gasoline Ignition System Ignition Type: Breakerless electronic ignition Engine Oil Oil Capacity With Filter: 7.0 Liters (7.4 US Quarts) Recommended Oil Viscosity: SAE 20W-50 or SAE 15W-40 (depending on climate) Oil Filter Part Number Example: Mann-Filter W108/2, Mahle OC 103, Bosch 0451103032 🔧 Transmission Standard Transmission Type: 4-speed Manual Transmission Optional Transmission Type: 4-speed Automatic Transmission (optional) Features Manual Fluid Type: API GL-4 SAE 75W-90 or SAE 80W-90 gear oil Automatic Fluid Type: MB 236.3 (Dexron II compatible) Manual Fluid Capacity: Approx. 1.3 Liters Automatic Fluid Capacity: Approx. 7.5 Liters (total capacity, including torque converter) 📐 Dimensions Exterior Length: 4725 mm (186.0 in) Width: 1790 mm (70.5 in) Height: 1440 mm (56.7 in) Wheelbase: 2795 mm (110.0 in) Weights Curb Weight: Approx. 1450-1550 kg (3197-3417 lbs) Gross Vehicle Weight: Approx. 1950 kg (4299 lbs) 🛡️ Safety...