🏷️ Basic Information Identification Make: Mercedes-Benz Model: 180D / 180Db / 180Dc Codes Chassis Codes: W121 (for earlier 180D), potentially W110 (for later variants if '180D' nomenclature persisted) Engine Codes: OM621 (Diesel) 👋 Introduction Market Position Market Segment: Compact executive car, known for Mercedes-Benz's reputation for build quality and engineering in its era. Competitive Analysis Competitors: Competed with vehicles like the Ford Consul, Vauxhall Cresta, and potentially entry-level models from BMW and Audi, though Mercedes-Benz occupied a premium niche. Key Features Diesel Efficiency: The 'D' variants emphasized fuel economy and durability characteristic of Mercedes-Benz diesel engines. Build Quality: Renowned for robust construction, longevity, and solid engineering, a hallmark of the brand. Design Philosophy: Embodied a conservative yet elegant design, prioritizing function and durability over fleeting trends. 📋 Manual Details Coverage Areas Covered Variants: Mercedes-Benz 180D, 180Db, 180Dc (Diesel variants) Page Count Page Count: 628 Manual Type Manual Type: Workshop Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine And Drivetrain: Detailed engine overhaul, fuel system (injection pump, injectors), cooling system, lubrication system, exhaust system, clutch, manual transmission, driveshaft, differential. Chassis And Suspension: Front and rear suspension (independent front, swing axle rear), steering system, wheel bearings, shock absorbers, springs. Brakes: Hydraulic drum brakes (front and rear), brake adjustments, fluid replacement, master cylinder, wheel cylinders, brake lines. Electrical System: Wiring diagrams, battery, charging system (generator/alternator), starter motor, ignition system (if applicable to diesel variants), lighting system, instrumentation, fuses, relays. Body And Interior: Body panel repair, doors, windows, locks, seat adjustments, interior trim, heating system, ventilation. Procedures Included Maintenance: Routine maintenance checks, oil changes, filter replacements, lubrication points, belt adjustments, fluid level checks. Diagnostics And Troubleshooting: System-specific diagnostic procedures, common fault identification, troubleshooting guides for engine performance, electrical issues, and mechanical failures. Repair And Rebuild: Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation of all major vehicle systems. Specifications And Tolerances: Precise technical specifications, torque values, clearances, and measurement tolerances for all serviceable components. Technical Depth Depth Of Coverage: Comprehensive, covering everything from basic preventative maintenance to full engine and transmission rebuilds, including electrical system diagnostics and bodywork. 📊 Manual Specifications File Format File Format: PDF Print Quality Print Quality: High-resolution, ensuring clarity of diagrams and text for printing. Binding Type Binding Type: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Inline 4-cylinder Diesel Displacement: 1.8 Liters (approx. 1798 cc) Bore X Stroke: 82.0 mm x 85.0 mm (typical for OM621) Compression Ratio: 22.0:1 (typical for OM621) Performance Horsepower: Approximately 50-55 hp @ 4000 rpm (variant dependent) Torque: Approximately 110-115 Nm @ 2000 rpm (variant dependent) Fuel System Fuel Injection: Bosch inline injection pump and injectors Fuel Type: Diesel Fuel Cooling System Cooling Method: Water-cooled Lubrication System Oil Capacity: Approximately 5.0 Liters (with filter change) Recommended Oil Type: API CD or equivalent diesel engine oil (e.g., SAE 10W-30 or 10W-40 depending on climate, consult manual for specifics) 🔧 Transmission Standard Transmission Type: 4-speed manual Optional Optional Transmission: Some variants offered a 4-speed automatic transmission. Features Clutch Type: Single dry plate, hydraulically operated Transmission Fluid: GL-4 Hypoid Gear Oil (e.g., SAE 80W or 80W-90, consult manual for specific capacity and type) 📐 Dimensions Exterior Body Styles: 4-door Sedan (Limousine), potentially Estate/Wagon (Universal variants were common in this era for Mercedes). Wheelbase: Approx. 2650 mm (for W121 chassis) Length: Approx. 4450 mm (for W121 chassis) Width: Approx. 1700 mm (for W121 chassis) Height: Approx. 1470 mm (for W121 chassis) Weights Curb Weight: Approx. 1200-1300 kg (variant dependent) 🛡️ Safety Features Ratings Crash Test Information: No formal crash test ratings comparable to modern standards exist for vehicles of this era. Safety features were rudimentary by today's standards. Active Features Active Safety Features: Hydraulic drum brakes, direct steering. Passive Features Passive Safety Features: Robust body structure for its time, safety-padded dashboard (optional on some models), two-point seat belts (often optional or dealer-fitted). 💡 Technology Features Infotainment Infotainment System: Basic. Typically featured an AM/FM radio, with optional cassette players becoming available in later iterations of similar models. Driver Assistance Driver Assistance Systems: None by modern standards. Basic safety was the focus. Connectivity Connectivity Features: No built-in connectivity features. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 5,000 - 7,500 km or 6 months (refer to manual for precise recommendation). Air Filter Replacement: Every 10,000 - 15,000 km or as needed based on operating conditions. Fuel Filter Replacement: Every 15,000 - 20,000 km or when experiencing starting or running issues. Fluid Specifications Coolant Type: Ethylene Glycol based coolant, typically a 50/50 mix with distilled water. (Consult manual for specific Mercedes-Benz approved coolant). Brake Fluid Type: DOT 3 or DOT 4 brake fluid (consult manual for exact specification). Known Issues Common Wear Items: Front suspension bushings, ball joints, tie rod...