Target Audience:
Mercedes-Benz W123 owners, DIY enthusiasts, professional mechanics
Value Proposition:
Saves money on repair costs, provides professional-grade repair and maintenance information, complete and intact
Comparison To Paper:
Electronic format offers convenience (print sections, no dirt), same content as physical manuals, potentially factory manual versions
Key Features Summary:
Comprehensive coverage, detailed diagrams, step-by-step instructions, troubleshooting assistance, electrical system diagnostics
Applicable Years:
1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985
Covered Models:
All W123 Sedan, Coupe, Wagon (Estate), and Long Wheelbase variants
Covered Engines:
All W123 Engine Types (Petrol and Diesel)
Covered Transmissions:
All W123 Transmission Types (Manual and Automatic)
Estimated Page Count:
Hundreds of pages (specific count not provided, but described as comprehensive)
Manual Type:
Workshop Repair Service Manual
Delivery Method:
Instant Download
Systems:
General Maintenance, Troubleshooting, Engine Service/Repair, Transmission Service/Repair, Brake System, Wiring Diagram, Electrical System, Suspension, Periodic Lubrication, Steering, Cooling System, Fuel Injection/Fuel System, Emission System, Heater/Air Conditioning, Engine Control System, Chassis/Body, Restraint System, Interior, Differential/Drive, Axle
Procedures:
Repair procedures, maintenance, disassembly, assembly, cleaning, reinstallation, diagnostic procedures, troubleshooting, electrical service procedures, lubrication
Depth:
Comprehensive, detailed, professional technician level
Illustrations:
Detailed illustrations, drawings, photos, enlarged insets
Instructions:
Numbered instructions, detailed substeps, notes, cautions, warnings
Engine Options Summary:
M110 (2.8L Inline-6 Petrol), M115 (2.0L Inline-4 Petrol), M116 (3.8L V8 Petrol - some markets/later models), OM615 (2.2L Inline-4 Diesel), OM616 (2.4L Inline-4 Diesel), OM617 (3.0L Inline-5 Diesel)
Performance Details:
Manual provides detailed specifications for horsepower, torque, and RPM for all covered engine variants
Fuel System Coverage:
Fuel Injection and Fuel System servicing and repair procedures
Standard Transmission:
4-speed and 5-speed Manual Transmissions
Optional Transmission:
3-speed and 4-speed Automatic Transmissions (e.g., 722.1, 722.3)
Transmission Coverage:
Service, repair, and overhaul procedures for all transmission types
Safety Features Coverage:
Manual covers restraint systems (seatbelts, potential airbags in later models), braking systems, and chassis integrity
Active Safety:
Brake system diagnostics and repair, steering system maintenance
Passive Safety:
Chassis/Body structural information relevant to safety, restraint system components
Infotainment Coverage:
Manual covers original radio systems and speaker installations
Driver Assistance Features:
Focus on mechanical and electrical systems; limited electronic driver aids typical for the era
Connectivity Features:
N/A for the era; manual focuses on core vehicle functions
General Maintenance Intervals:
Manual provides detailed schedules for oil changes, filter replacements, fluid checks, lubrication, and belt inspections
Engine Oil Type:
Covers various API classifications (e.g., SE, SF) and viscosity grades (e.g., 10W-40, 15W-40) depending on engine and climate, manual will specify correct types
Coolant Type:
Typically a glycol-based antifreeze, manual will detail specific Mercedes-Benz specifications
Transmission Fluid Type:
Specifies Dexron II or equivalent for automatic transmissions and gear oil specifications for manual transmissions
Brake Fluid Type:
DOT 3 or DOT 4 specified, manual confirms correct type
Power Steering Fluid:
Typically ATF Dexron II or equivalent, manual will confirm
Common Issues Covered:
Manual addresses common W123 issues such as vacuum leaks, climate control system faults, diesel injection pump calibration, and rust prevention/repair
Torque Specifications:
Detailed torque values for critical fasteners across all systems
Brand Legacy:
Mercedes-Benz known for engineering excellence, durability, and luxury
W123 Significance:
Highly successful and durable model, known as the 'tank' of Mercedes-Benz, solidified brand's reputation for reliability
Production Period:
1976-1985
Production Volume:
Over 2.7 million units worldwide
