🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 E-Class Common Name: W123 Generation Production Years: 1976-1986 Codes Chassis Code: W123 👋 Introduction Market Position Target Audience: Mercedes-Benz W123 owners, independent repair shops, classic Mercedes enthusiasts Competitive Analysis Differentiation: Official dealership-level repair data, not generic DIY guides Key Features Uniqueness: Covers all W123 variants and models within the specified year range Authority: Authoritative source for maintenance, service, and repair procedures 📋 Manual Details Coverage Areas Scope: Comprehensive: All models, all repairs A-Z Page Count Estimated Page Count: Varies by specific edition, typically 500+ pages Manual Type Type: Service and Repair Manual Language Language: English Format Format: Digital (e.g., PDF) or Printed 📖 Manual Coverage Systems Covered Engine Service And Repair: Detailed procedures for all gasoline and diesel engines Transmission Service And Repair: Manual and automatic transmission overhaul and repair Fuel And Emission Systems: Carburetor and fuel injection systems, emissions controls Electrical System: Wiring diagrams, starter, alternator, ignition, lighting, accessories Brake System: Hydraulic systems, ABS (if applicable to later models), brake component replacement Suspension And Steering: Front and rear suspension, power steering, alignment specifications Body And Chassis: Body panel repair, structural integrity, chassis components Heating And Air Conditioning: HVAC system diagnosis and repair Procedures Included Routine Maintenance: Oil changes, filter replacements, fluid checks, tune-ups Diagnostic Troubleshooting: Systematic fault finding and repair procedures Component Replacement: Step-by-step guides for major component removal and installation Engine Rebuilding: Detailed specifications and procedures for engine overhaul Electrical Diagnostics: Using wiring diagrams for troubleshooting Torque Specifications: Precise tightening specifications for all critical fasteners Technical Depth Depth: Vehicle Specific, Technician Level Accuracy: Factory-level accuracy and detail 📊 Manual Specifications File Format Searchability: Likely searchable text if digital PDF Digital Format Advantages: Easy searchability, instant access, printable pages Print Quality Illustrations: High-quality diagrams, schematics, and photographs Binding Type Binding: Durable binding for frequent use (for print versions) Paper Type Paper Quality: Durable, shop-grade paper stock (for print versions) ⚙️ Engine Specifications Primary Engine Available Engines Overview: Wide range of inline-4 and inline-6 gasoline (M115, M123, M110) and diesel (OM615, OM616, OM617) engines Engine Examples 2.4L Diesel (Om616): Displacement: 2.4 liters, Power: ~70 hp, Torque: ~134 Nm 3.0L Diesel (Om617): Displacement: 3.0 liters, Power: ~80-88 hp (turbocharged variants available later), Torque: ~173-192 Nm 2.0L Gasoline (M115): Displacement: 2.0 liters, Power: ~94 hp, Torque: ~150 Nm 2.8L Gasoline (M110): Displacement: 2.8 liters, Power: ~137-185 hp (dual overhead cam), Torque: ~221-250 Nm Performance Acceleration Characteristics: Designed for durability and comfort, not outright performance; varies significantly by engine and transmission Fuel System Gasoline Fuel Delivery: Carburetor (e.g., Solex, Zenith) for earlier models, Bosch K-Jetronic fuel injection for later gasoline models Diesel Fuel Delivery: Bosch inline injection pumps 🔧 Transmission Standard Standard Transmission: 4-speed or 5-speed manual transmission Optional Optional Transmission: 3-speed or 4-speed automatic transmission (e.g., 722.1, 722.3 series) Features Automatic Transmission Features: Selectable modes (e.g., 'S' for Standard, 'E' for Economy) 📐 Dimensions Exterior Body Styles: Sedan (4-door), Sedan (2-door), Estate/Wagon (T-model), Coupe (C123), often referred to as 'CE' Overall Length: Varies by body style, e.g., Sedan approx. 4720-4788 mm Overall Width: Varies by body style, e.g., Sedan approx. 1790 mm Wheelbase: Varies by body style, e.g., Sedan approx. 2795 mm Cargo Cargo Capacity Wagon: Generous for its era, particularly the T-model variant Weights Curb Weight: Approximately 1400-1700 kg depending on engine and body style 🛡️ Safety Features Ratings Historical Safety Context: Considered very safe for its era, with robust chassis construction Active Features Braking System Design: Four-wheel disc brakes on many models, with power assistance Passive Features Body Structure: Reinforced passenger compartment, crumple zones Steering Column: Collapsible steering column 💡 Technology Features Infotainment Original Infotainment: Basic radio (mono or stereo), cassette player in some higher trims Driver Assistance Advanced Features For Era: Power steering, cruise control (optional on some models), central locking (vacuum operated) Connectivity Connectivity Features: N/A (pre-digital era) 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000-10,000 km or annually, depending on engine and oil type Major Service Milestones: Key checks and replacements at 20,000 km, 40,000 km, 80,000 km intervals Fluid Specifications Engine Oil Specification: Refer to manual for specific API service classifications (e.g., API SG for gasoline, CD for diesel) and viscosity grades (e.g., SAE 10W-40, 15W-40) Coolant Specification: Mercedes-Benz Approved Antifreeze/Coolant Concentrate (e.g., G48) Automatic Transmission Fluid: ATF Dexron III or equivalent (refer to specific transmission model) Brake Fluid Specification: DOT 3 or DOT 4 Known Issues Common W123 Issues: Rust (wheel arches, sills, door bottoms), injector pump seal leaks (diesel), vacuum door lock system issues, oil cooler leaks, climate control (if fitted) Parts Numbers Example Oil Filter Part Number: Mann-Filter HU 718/1 K or equivalent (engine dependent) Example Air Filter Part Number: Mann-Filter C 2420 or equivalent (engine dependent) 📚 Vehicle History Brand Heritage Mercedes Benz Reputation: Renowned for engineering excellence, durability, and build quality...