🏷️ Basic Information Identification Make: Mercedes-Benz Model: 280 E Year: 1981 Codes Chassis Code: W123 👋 Introduction Market Position Market Position: The Mercedes-Benz 280 E (W123) represented a pinnacle of German engineering for its era, offering a blend of luxury, comfort, and robust build quality. It was a direct competitor to other premium sedans of the late 1970s and early 1980s. Competitive Analysis Competitors: BMW 5 Series (E28), Audi 100 (C2), Volvo 240 Series. Key Features Key Features Of Vehicle: Exceptional build quality, comfortable ride, reliable and powerful M110 inline-six engine, advanced (for its time) K-Jetronic fuel injection, and a robust chassis. Key Features Of Manual: Comprehensive coverage, step-by-step instructions, clear diagrams and illustrations, wiring schematics, and essential technical specifications for repair and maintenance. 📋 Manual Details Coverage Areas Systems Covered: Engine Mechanical, Fuel System, Ignition System, Cooling System, Lubrication System, Exhaust System, Clutch, Manual Transmission, Automatic Transmission, Drive Shaft, Front Axle, Rear Axle, Suspension, Steering, Brakes, Electrical System, Body, HVAC, Lubrication, Maintenance Page Count Estimated Page Count: High (Detailed, comprehensive coverage suggests over 1000 pages typical for such manuals) Manual Type Manual Type: Factory Service Manual / Repair Manual Language Language: English Format Format: PDF / WINRAR Download 📖 Manual Coverage Systems Covered Engine Mechanical: Complete overhaul procedures for the M110 engine, including cylinder head, crankshaft, connecting rods, pistons, timing chain, oil pump, and oil pan. Fuel System: Detailed diagnostics and repair for the Bosch K-Jetronic fuel injection system, including fuel pump, fuel distributor, air flow sensor, injectors, and fuel lines. Ignition System: Information on the electronic ignition system, including distributor, ignition coil, spark plugs, and troubleshooting. Cooling System: Procedures for inspecting and replacing radiator, water pump, thermostat, hoses, and checking coolant level and antifreeze protection. Lubrication System: Engine oil and filter change procedures, oil pressure checks, and oil pan gasket replacement. Exhaust System: Inspection and tightening of exhaust manifold seating and exhaust system connections, oxygen sensor replacement. Transmission Manual: Manual transmission oil change, checking and correcting oil level. Transmission Automatic: Automatic transmission fluid and filter change, checking and correcting fluid level. Drivetrain: Transfer case fluid change, checking and correcting fluid level, drive shaft flexible coupling inspection. Suspension Steering: Front and rear axle oil changes, checking and correcting axle oil levels, ball joint inspection, steering play checks, and steering bolt tightening. Brakes: Brake fluid level check, brake line inspection, brake pad and disc thickness checks, parking brake adjustment, and brake fluid replacement. Electrical System: Wiring schematics, troubleshooting of warning and indicator lamps, headlamp and exterior lamp inspection. Bodywork: Body structure inspection, water leakage and corrosion inspection, lubricating door hinges and locks, sunroof maintenance, soft top inspection, paint damage checks. HVAC: Replacing dust filter, active charcoal filter, and recirculating air filter; checking and correcting AC refrigerant charge. Procedures Included Maintenance: Regular scheduled maintenance, fluid changes (oil, coolant, transmission, differential), filter replacements (oil, fuel, air), spark plug service, belt inspection and replacement, lubrication. Troubleshooting: Diagnostic procedures for common issues, fault finding for engine, fuel, ignition, and electrical systems. Repair: Step-by-step instructions for component removal, installation, and rebuilding for all major vehicle systems. Diagnostics: Detailed diagnostic flowcharts and testing procedures for fuel injection, ignition, and electrical systems. Technical Depth Depth Of Coverage: Comprehensive, covering everything from basic fluid checks to complete engine and transmission overhauls, suitable for both DIY enthusiasts and professional mechanics. 📊 Manual Specifications File Format File Format Details: Delivered as a downloadable archive (WINRAR) containing PDF files, ensuring cross-platform compatibility and easy access. Print Quality Print Quality: High-quality scans with clear diagrams and text, optimized for printing. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: M110.984 (or similar variants) Engine Type: Inline-6, SOHC Displacement: 2746 cc (2.8 Liters) Performance Horsepower: Approximately 140-155 hp (depending on specific market and tuning) Torque: Approximately 230-240 Nm (169-177 lb-ft) Fuel System Fuel Injection: Bosch K-Jetronic Mechanical Fuel Injection Fuel Type: Unleaded gasoline (91 RON or higher recommended) 🔧 Transmission Standard Standard Transmission: 4-speed Manual Transmission Optional Optional Transmission: 4-speed Automatic Transmission (722.1) Features Transmission Fluid Type: Dexron III / Mercon (or equivalent specification for automatic) 📐 Dimensions Exterior Wheelbase: 2790 mm (109.8 inches) Length: 4725 mm (186.0 inches) Width: 1780 mm (70.1 inches) Height: 1430 mm (56.3 inches) Weights Curb Weight: Approximately 1450-1550 kg (3200-3420 lbs) Wheel Bolt Pattern: 5x112 🛡️ Safety Features Ratings Safety Ratings: While official crash test ratings from modern organizations are not directly applicable to this era, the W123 chassis was renowned for its robust construction and safety cage. Active Features Active Safety Features: Four-wheel disc brakes (on most models), power steering. Passive Features Passive Safety Features: Reinforced safety cage, crumple zones, padded dashboard, seat belts. 💡 Technology Features Infotainment Infotainment Features: Basic AM/FM radio with cassette player, analog climate controls. Driver Assistance Driver Assistance Features:...