Target Audience:
DIY mechanics, classic car enthusiasts, professional repair shops specializing in vintage Mercedes-Benz
Value Proposition:
Provides factory-level diagnostic, repair, and maintenance information, enabling significant cost savings on repairs and maintenance
Benefits:
Up-to-date technical information, detailed procedures, diagnostic guidance, and comprehensive coverage of all vehicle systems
Origin:
Original workshop manual, same as used in local service/repair shops, written by the manufacturer
Engine Management:
Engine Service/Repair, Fuel Injection/Fuel System, Engine Control System, Emission System, Cooling System
Drivetrain:
Transmission Service/Repair, Differential/Drive, Axle
Chassis:
Brake System, Suspension, Steering, Chassis/Body
Electrical And HVAC:
Electrical System, Wiring Diagram, Heater/Air Conditioner
Interior And Safety:
Restraint System, Interior
Maintenance:
General Maintenance, Periodic Lubrication
Repair:
Detailed substeps expand on repair procedure information, Disassembly, Assembly, Reinstalling Procedures
Diagnostics:
Troubleshooting, Electrical System Diagnosis and Repair
Depth:
Comprehensive diagnostics, repair, and maintenance information used by professional technicians
Visuals:
Detailed illustrations, drawings and photos, Enlarged inset helps identify and examine parts
Engine Type:
Inline 6-Cylinder
Displacement:
2.8 Liters (2780 cc)
Horsepower Range:
Approximately 150-180 hp (depending on specific variant and market)
Torque Range:
Approximately 177-200 lb-ft (depending on specific variant and market)
Fuel Delivery:
Bosch K-Jetronic (CIS) Mechanical Fuel Injection
Ignition Type:
Electronic Ignition System
Crash Test History:
W123 platform generally well-regarded for its robust construction for the era. Specific ratings may vary by region and testing body.
Features:
Reinforced safety cage, crumple zones, padded interior, seat belts (front standard, rear optional/standard by year/market)
Features:
Four-wheel disc brakes (standard on 280 model), power steering
Oil Change:
Typically every 7,500 - 15,000 miles (12,000 - 24,000 km) or 12 months, consult manual for specific intervals based on driving conditions.
Major Tune Up:
Refer to manual for scheduled intervals for spark plugs, fuel filter, air filter replacement.
Engine Oil:
Refer to manual for specific viscosity (e.g., SAE 20W-50, SAE 10W-40) and API classification based on climate. Typically high-quality synthetic or semi-synthetic recommended.
Coolant:
Mercedes-Benz approved coolant (e.g., G48) with a 50/50 mix of antifreeze and distilled water.
Transmission Fluid Auto:
Dexron-III or equivalent ATF (Automatic Transmission Fluid). Specific Mercedes-Benz part number reference in manual is crucial.
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Power Steering Fluid:
Dexron-II or equivalent hydraulic fluid. Consult manual for specific MB approval.
Common Wear Items:
Suspension bushings, ball joints, tie rod ends, fuel distributor O-rings, vacuum hoses, engine mounts.
Electrical Gremlins:
Can occur due to age; wiring insulation degradation, faulty relays, and aged switches are common. Detailed wiring diagrams are essential.
Cooling System:
Radiator leaks, water pump failures, thermostat issues, and heater core clogs can occur with age.
Oil Filter Example:
Mann-Filter W102, Bosch 0 451 103 003 (Note: Always verify part number for specific VIN)
Air Filter Example:
Mann-Filter C35164, Bosch 1 457 429 957 (Note: Always verify part number for specific VIN)
Manufacturer Reputation:
Mercedes-Benz known for engineering excellence, durability, and luxury.
W123 Series Impact:
The W123 series cemented Mercedes-Benz's reputation for reliability and build quality, becoming an iconic model.
Production Period:
1976-1985
Manufacturing Sites:
Various Mercedes-Benz plants globally, notably in Germany.
