🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 E-Class Year: 1983 Codes Chassis Code: W123 👋 Introduction Market Position Positioning: The Mercedes-Benz W123 series was positioned as a durable, luxurious, and reliable executive car, known for its exceptional build quality and longevity, often considered a benchmark in its class. Competitive Analysis Competitors: Competed primarily with other European luxury sedans and coupes such as the BMW 5 Series (E28), Audi 100, and Volvo 240/740. Key Features Distinguishing Features: Robust build, excellent ride quality, durable diesel engines (especially the OM617), sophisticated engineering, and a reputation for long-term reliability. Manual Value Proposition Value For Owners: Provides essential, accurate, and vehicle-specific information for owners and independent technicians to perform maintenance, diagnosis, and repairs, ensuring proper upkeep and preserving the vehicle's value. 📋 Manual Details Coverage Areas Model Variants Covered: All W123 E-Class Sedan (W123.033), Coupe (W123.053), and Estate/Kombi (S123.023) models with relevant engine options for 1983. Page Count Estimated Page Count: Approximately 1000+ pages (typical for comprehensive factory service manuals of this era, specific count may vary by edition). Manual Type Type: Factory Authorized Service and Repair Manual Language Language: English Format Format: Likely Printed Book (Original Factory Manual) or High-Quality Digital Scan (PDF) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine disassembly, assembly, diagnosis, and repair for all petrol and diesel variants offered in 1983 W123 models. Engine Performance: Fuel injection systems (Bosch K-Jetronic for petrol, M-M or OM61X diesel injection pumps), ignition systems, cooling systems, lubrication systems, emissions control systems. Transmission: Manual and automatic transmission service, repair, overhaul, fluid specifications, and troubleshooting. Drivetrain: Front suspension, rear axle (independent suspension), driveshafts, differential service and repair. Brakes: Hydraulic system, brake discs, pads, calipers, parking brake, ABS (if equipped on specific export models or late production). Steering: Power steering system, steering column, linkage, alignment specifications. Electrical: Complete wiring diagrams, starter, alternator, battery, lighting systems, instrumentation, fuse/relay identification and testing, comfort features. Body And Chassis: Body repair, rust prevention, door mechanisms, window regulators, seals, bumpers, chassis lubrication points. Climate Control: Heating, ventilation, and air conditioning (HVAC) system service, refrigerant handling, component testing. Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, tune-ups, lubrication, timing belt/chain inspection (if applicable). Diagnostics: Systematic troubleshooting guides, fault code interpretation (if applicable), diagnostic charts for common issues. Repair: Detailed step-by-step repair procedures for all major and minor mechanical, electrical, and body components. Rebuilds: Complete engine and transmission overhaul procedures with specifications. Adjustments: Valve adjustments, idle speed adjustments, ignition timing, clutch adjustments, parking brake adjustments. Specifications: Torque specifications, clearances, fluid capacities, diagnostic values. Technical Depth Depth: Comprehensive, covering basic maintenance to complete engine and transmission rebuilds, and advanced electrical diagnostics. 📊 Manual Specifications File Format Digital Format Quality: High-resolution scans, searchable text (if OCR processed), printable pages. Print Quality Print Quality: Original factory print quality, clear diagrams and illustrations. Binding Type Binding: Original: Typically hardbound or robust spiral-bound for workshop durability. Digital: PDF. Paper Type Paper Type: Original: High-quality, durable paper stock suitable for workshop environments. Digital: N/A. ⚙️ Engine Specifications Primary Engine Petrol Engine Code: M102 (e.g., 2.3L) Displacement Petrol: 2.3 Liters (various configurations like 230E) Horsepower Petrol: Approx. 130-140 hp (for 230E) Torque Petrol: Approx. 190-200 Nm (for 230E) Primary Engine Diesel Engine Code Diesel: OM617 (e.g., 3.0L Diesel, 3.0L Turbo Diesel) Displacement Diesel: 3.0 Liters (e.g., 300D, 300TD, 300CDT) Horsepower Diesel: Approx. 80-88 hp (Naturally Aspirated Diesel), Approx. 115-125 hp (Turbo Diesel) Torque Diesel: Approx. 170-185 Nm (Naturally Aspirated Diesel), Approx. 230-250 Nm (Turbo Diesel) Fuel System Petrol Fuel Injection Petrol: Bosch K-Jetronic (CIS) Mechanical Fuel Injection Fuel System Diesel Fuel Injection Diesel: Bosch Inline Injection Pump (Mechanical) Ignition System Ignition Type: Distributor-based ignition system with electronic control module on some petrol models. 🔧 Transmission Standard Transmission Type Standard: 4-Speed Manual Transmission (on most models) Optional Transmission Type Optional: 4-Speed Automatic Transmission (optional, highly sought after) Features Automatic Features: Hydraulic torque converter, selector positions P-R-N-D-2 (with some models potentially having a '3' for 3-speed automatic or a different gear selection for 4-speed). Fluid Specifications Automatic Transmission Fluid: MB BeVo 236.1 or equivalent ATF (e.g., Dexron II or III, specific to MB approval) Manual Transmission Fluid: MB 235.0 Gear Oil (e.g., SAE 90) 📐 Dimensions Exterior Sedan Length Sedan: Approx. 4,725 mm (186.0 in) Width Sedan: Approx. 1,790 mm (70.5 in) Height Sedan: Approx. 1,440 mm (56.7 in) Exterior Coupe Length Coupe: Approx. 4,725 mm (186.0 in) Height Coupe: Approx. 1,419 mm (55.9 in) Exterior Estate Length Estate: Approx. 4,780 mm (188.2 in) Height Estate: Approx. 1,490 mm (58.7 in) Weights Curb Weight Approx: 1,400 - 1,600 kg (depending on engine and body style) Wheelbase: Approx. 2,790 mm (109.8 in) 🛡️ Safety Features Ratings Crash Test Era Compliance: Designed to meet safety standards of its era, including crumple zones and safety cage construction. Official ratings for this period are...