🏷️ Basic Information Identification Make: Mercedes-Benz Model: W123 Series (200D, 240D, 300D) Production Years: 1976-1985 Covered Model Years: 1979-1985 Chassis Code: W123 Engine Variants Covered: 200D (OM615), 240D (OM616), 300D (OM617) Body Styles Covered: Sedan, Wagon (Estate), Coupe (explicitly mentioned if available within the specific manual's scope) 👋 Introduction Market Position Positioning: Essential reference for owners of the robust and reliable W123 Mercedes-Benz diesel models, emphasizing practical knowledge for daily use and basic upkeep. Competitive Analysis Value Proposition: Provides comprehensive operational and maintenance guidance for a classic diesel vehicle, crucial for preserving longevity and understanding its unique characteristics. Priced for accessibility to owners. Key Features Features: Instantly accessible digital format, comprehensive coverage of core vehicle systems and operation, illustrated table of contents for easy navigation, English language for broad accessibility. Target Audience Audience: Owners of 1979-1985 Mercedes-Benz 200D, 240D, and 300D W123 models, particularly those seeking to understand and maintain their vehicles effectively. 📋 Manual Details Coverage Areas Primary Focus: Owner's Information and Operation Specific Chapters Listed: Instruments and controls, Pre-driving checks and adjustments, Monitor, heater, air conditioner, audio, phone and voice recognition systems, Starting and driving, In case of emergency, Appearance and care, Maintenance and do-it-yourself, Technical and consumer information, Safety (Seats, seat belts, supplemental restraint system) Page Count Estimated Pages: Likely 150-250 pages (typical for owner's manuals of this era, exact count not provided but indicated by detailed TOC) Manual Type Type: Owner's Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain Management: Basic operation of diesel engine systems, fuel, lubrication, cooling (as relevant to owner operation and checks). Chassis Systems: Brake system operation (as per owner), Suspension system basics (owner checks). Electrical Systems: Instrument cluster functions, lighting, basic accessory operation (audio, climate control). Climate Control: Operation of heater, ventilation, and air conditioning systems. Safety Systems: Seat belt operation and adjustment, SRS (Supplemental Restraint System) – likely referring to early airbag systems if equipped on later models, though less common on these diesels. Focus on occupant safety features. Procedures Included Operational Procedures: Starting the engine, shifting gears, driving techniques, parking, proper use of all controls and features. Pre Trip Inspections: Checks of fluid levels (oil, coolant, washer fluid), tire pressure, lights, wipers. Emergency Procedures: What to do in case of breakdowns, flat tires, accidents, and using emergency equipment. Maintenance Diy: Basic owner-level maintenance tasks such as checking fluid levels, changing wiper blades, and potentially bulb replacement. Guidance on when professional service is required. Appearance Care: Cleaning and protecting the vehicle's exterior and interior. Technical Depth Depth: Owner-oriented, focusing on operation, care, and basic checks. Does not provide in-depth diagnostic or repair procedures typically found in a workshop manual. 📊 Manual Specifications File Format Format: PDF Compatibility: All Versions of Windows & Mac Downloadability: Instant Download Software Requirements: Adobe PDF Reader Print Quality Quality: Digital reproduction of original documentation, expected to be clear and readable, suitable for printing. Binding Type Type: N/A (Digital Download) Paper Type Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code 200D: OM615 Engine Code 240D: OM616 Engine Code 300D: OM617 Configuration: Inline 4-cylinder (OM615, OM616), Inline 5-cylinder (OM617) Diesel Performance Displacement 200D: 2.0 L (1988 cc) Displacement 240D: 2.4 L (2399 cc) Displacement 300D: 3.0 L (3005 cc) Horsepower 200D: Approx. 55-72 hp Horsepower 240D: Approx. 72-80 hp Horsepower 300D: Approx. 77-88 hp (non-turbo), 123 hp (300TD Turbo-Diesel) Fuel System Injection Type: Indirect Injection (IDI) with Bosch inline fuel injection pump Fuel Type: Diesel Fuel 🔧 Transmission Standard Transmission Type: 4-speed Manual (standard on some models, especially earlier ones) Optional Transmission Type Optional: 4-speed Automatic (722.1), 5-speed Manual (later models for some variants) Features Automatic Features: Hydraulic torque converter, selector lever positions (P, R, N, D, 2, 1). Fluid Specifications Automatic Transmission Fluid: MB-Approval 236.3 (e.g., Mobil ATF 220 or equivalent) 📐 Dimensions Exterior Wheelbase Sedan: Approx. 2797 mm (110.1 in) Wheelbase Wagon: Approx. 2855 mm (112.4 in) Weights Curb Weight Approx: 1400-1600 kg (depending on model and equipment) Gross Vehicle Weight Rating Approx: 1900-2100 kg 🛡️ Safety Features Ratings Crash Test Era Consideration: Vehicles of this era were not subjected to the same rigorous standardized crash testing as modern vehicles (e.g., NHTSA, IIHS front/side impact). Safety was focused on passive restraint systems and robust construction. Active Features Braking System: Four-wheel disc brakes (front ventilated) on most models, with dual-circuit hydraulic system. Power assist standard. Steering: Recirculating ball steering, power steering often optional or standard on larger engines. Passive Features Seat Belts: Three-point inertia-reel seat belts for front occupants, lap belts for rear passengers (standard or optional based on market/year). Body Structure: Reinforced passenger cell, crumple zones, side-impact protection beams. 💡 Technology Features Infotainment Audio System: Factory fitted or dealer installed radio/cassette systems. Manual will detail operation of original units. Driver Assistance Cruise Control: Optional on some...