🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 Series 280CE Year Range: 1978-1981 Chassis Code: W123.053 Engine Code: M110.984 👋 Introduction Market Position Target Audience: DIY enthusiasts, independent repair shops, Mercedes-Benz owners Value Proposition: Inexpensive way to maintain and repair the vehicle, provides dealer-level information Competitive Analysis Alternative Sources: Dealer Service Department, other aftermarket manuals (e.g., Haynes, Chilton - typically less comprehensive) Key Features Completeness: Covers all diagnostic and repair procedures, often referred to as a Factory Service Manual (FSM) Usability: Printable pages for garage use, detailed illustrations 📋 Manual Details Coverage Manual Type: Service Repair Manual Language: English Format: PDF Download Print Restriction: Printable without restriction Delivery Method: Download link on checkout page 📖 Manual Coverage Systems Covered Engine Mechanical: Yes (Removal/Installation, Crankcase, Cylinder Head, Engine Breathing, Crank Assembly, Timing, Valves) Engine Fuel System: Yes (Diesel Injection System, Carburetor System, Mechanically/Electronically Controlled Gasoline Injection) Engine Lubrication: Yes (Lubrication, Oil Cooler) Engine Cooling: Yes (Cooling System, Hoses, Radiator) Engine Electrical: Yes (Ignition System, Preheating System, Starter, Alternator) Engine Intake Exhaust: Yes (Air Cleaner, Intake Manifold, Exhaust Manifold, Emission Control) Transmission Manual: Yes (Manual Transmission, Power Take-offs) Transmission Automatic: Yes (Automatic Transmission) Drivetrain: Yes (Propeller Shaft, Transfer Case) Suspension: Yes (Suspension, Front Axle, Rear Axle, Trailing Axle) Brakes: Yes (Hydraulic/Mechanical System, Pneumatic System, Auxiliary Brakes) Steering: Yes (Steering) Fuel System: Yes (Fuel System) Exhaust System: Yes (Exhaust System, Heat Shield) Electrical Body: Yes (Equipment/Instruments, Speed Control, Radio, Washer System, Light Range Regulator) Body Structural: Yes (Frame, Understructure, Front End, Front Wall, Side Wall, Rear Wall, Roof) Body Exterior: Yes (Glass/Windows, Doors, Trunk Lid, Fuel Flap, Slide Roof, Attachments, Outside Flaps) Body Interior: Yes (Interior Equipment, Seats, Restraint Systems, Sound Insulation, Body Sealing) Climate Control: Yes (Climate Control) Safety Equipment: Yes (Emergency Equipment) Procedures Included Maintenance: Yes (Scheduled Maintenance, Fluid Changes, Filter Replacements) Repair: Yes (Component Removal, Installation, Rebuild, Refurbishment) Diagnostics: Yes (All Diagnostic Procedures Covered) Adjustments: Yes (Throttle Linkage, Regulating Shafts, Accelerator Pedal) Restoration: Yes (Comprehensive Restoration Guidance) Technical Depth Depth: Comprehensive (Dealer Level) Illustrations: Detailed Illustrations Instructions: Step-by-Step Instructions 📊 Manual Specifications File Attributes File Format: PDF Print Quality: High-Resolution, Printable Searchable Text: Likely Searchable (typical for PDF manuals) Binding Type Binding Type: Digital Download (Printable) Paper Type Paper Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: Inline-6 Cylinder, DOHC (Double Overhead Camshaft) Displacement: 2.8 Liters (2799 cc) Bore X Stroke: 86.0 mm x 80.25 mm (approximate) Compression Ratio: 8.3:1 (typical for M110.984) Performance Horsepower: 182 hp @ 5800 rpm (SAE Gross, typical for US spec) Torque: 177 lb-ft @ 4000 rpm (SAE Gross, typical for US spec) Fuel System Fuel Delivery: Bosch K-Jetronic (CIS - Continuous Injection System) Fuel Type: Unleaded Gasoline (91-93 Octane recommended) Cooling System Cooling Type: Liquid-Cooled Lubrication Oil Capacity: 7.5 Liters (8 US Quarts) 🔧 Transmission Standard Transmission Type: 4-Speed Manual (often available) Optional Transmission Type: 4-Speed Automatic (4G-Tronic / 722.1) Features Automatic Transmission Features: Hydromechanical control, torque converter 📐 Dimensions Exterior Body Style: Coupé (CE designation) Wheelbase: 2795 mm (110 inches) Length: 4765 mm (187.6 inches) Width: 1780 mm (70.1 inches) Height: 1420 mm (55.9 inches) Weights Curb Weight: Approximately 1500 kg (3300 lbs) Gross Vehicle Weight Rating: Varies by specification 🛡️ Safety Features Ratings Crash Test Data: Limited verifiable crash test data for this specific era and model; known for robust build quality. Active Features Active Safety: Four-wheel disc brakes (standard on 280CE), power steering Passive Features Passive Safety: Reinforced passenger cell, safety steering column, padded dashboard 💡 Technology Features Infotainment Original Audio: Optional AM/FM radio with cassette player. Driver Assistance Driver Assistance Systems: Optional cruise control (known as 'Tempomat' by Mercedes-Benz). Connectivity Connectivity Features: N/A (Era appropriate technology) 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 to 10,000 miles (12,000 to 15,000 km) or 6-12 months, depending on driving conditions. Air Filter Replacement: Every 15,000 to 30,000 miles (24,000 to 48,000 km) Spark Plug Replacement: Every 30,000 miles (48,000 km) Fluid Specifications Engine Oil Spec: API SG or higher; SAE 10W-40 or 15W-40 recommended (consult specific manual for exact OEM recommendation, e.g., MB 228.1). Coolant Spec: Ethylene Glycol based antifreeze/coolant (e.g., MB 325.0 or equivalent) mixed 50/50 with distilled water. Automatic Transmission Fluid: MB 236.1 (Dexron II or equivalent) Brake Fluid Spec: DOT 3 or DOT 4 Known Issues Common W123 Issues: Rust (wheel arches, door bottoms, jacking points), vacuum leaks (central locking, climate control), fuel distributor issues (K-Jetronic), aging rubber components (hoses, mounts), ignition system components. 📚 Vehicle History Brand Heritage Brand Philosophy: Engineering excellence, durability, and safety Model Evolution W123 Introduction: Introduced in 1975 as a successor to the W114/W115, known for its robust construction and longevity. 280Ce Positioning: The 280CE was a premium, sporty coupé variant, representing the pinnacle of luxury and performance within the W123 range for its time. Production Production Period: 1976-1985 (W123 Series);...